Exploring the Orient Kamasu Green Watch


The Orient Kamasu Green is a mid-range automatic dive watch, known for its stylish green dial, reliable Japanese movement, and impressive value proposition. It boasts features like a sapphire crystal for scratch resistance, a 200-meter water resistance rating, and a stainless steel bracelet for durability.

Dive watches hold a unique position in the watch industry. They represent a blend of functionality, durability, and style. Originally designed for professional divers, they evolved into coveted timepieces for their robust construction, water resistance, and distinct aesthetic.

These qualities not only make them ideal for underwater adventures but also translate into everyday reliability and a bold, sporty look. This versatility has contributed to their enduring popularity and influence on the broader watch market.

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Orient Kamasu Green Review


The Orient Kamasu Green is a visually striking watch. Its sunburst green dial takes center stage, offering a playful transition of color depending on the lighting. It can appear almost black in low light, while revealing captivating shades of green in brighter conditions. This dynamic effect, coupled with the applied silver indices and large, easy-to-read hands, creates a sophisticated yet sporty look.

The watch is constructed from high-quality materials. The stainless steel case and bracelet are solid and comfortable, while the sapphire crystal offers superior scratch resistance.


The Kamasu Green boasts a range of useful features for both diving and everyday wear. These include:

  • Automatic movement: This eliminates the need for batteries, offering convenience and long-term reliability.
  • 200-meter water resistance: Suitable for recreational diving and swimming.
  • Unidirectional bezel: Helps divers track elapsed time underwater.
  • Luminous hands and markers: Enhance legibility in low-light conditions.
  • Day and date window: Provides additional functionality for everyday use.


The Kamasu Green performs admirably in various conditions. The automatic movement keeps accurate time, while the water resistance allows for confident underwater exploration. The lume glows brightly for easy reading in darkness, and the bezel operates smoothly.


The solid construction and high-quality materials contribute to the watch’s excellent durability. The sapphire crystal is particularly scratch-resistant, while the stainless steel case and bracelet can withstand everyday wear and tear.

Longevity and Reliability

Orient’s in-house automatic movement is known for its longevity and reliability. With proper care, the Kamasu Green can be a reliable timepiece for years to come.

However, it’s important to note that the bracelet is sometimes described as slightly less refined compared to the rest of the watch. While sturdy, it might not feel as premium as some users expect.

Orient Kamasu Green Specifications

Dimensions and Weight

  • Case diameter: 41.8 mm (without crown)
  • Lug to lug length: 46.8 mm
  • Case thickness: 12.8 mm
  • Weight: Approximately 190 grams (including bracelet)


  • Case: Brushed stainless steel
  • Bezel: Stainless steel (unidirectional, 120 clicks)
  • Crystal: Sapphire crystal
  • Crown: Screw-down crown
  • Dial: Green sunburst
  • Hands: Luminous hands (silver)
  • Indices: Applied silver indices with luminescence
  • Bracelet: Stainless steel (3-link) with solid fold-over clasp and double push-button safety

Water Resistance

200 meters (20 ATM)

Other Relevant Details

  • Movement: Orient Caliber F6922 (automatic, self-winding, hand-winding, hacking)
  • Power Reserve: Approximately 40 hours
  • Functions: Day and date display
  • Warranty: 1 year international warranty

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Orient Kamasu Green Price and Availability


The Orient Kamasu Green’s price can vary depending on the retailer, region, and any ongoing promotions. However, it generally falls within the mid-range price segment, typically ranging from $250 to $350 USD.


The Orient Kamasu Green enjoys global availability and can be found online through various watch retailers and e-commerce platforms like Amazon. It might also be available in authorized Orient retailers in your region.

It’s important to compare prices and check for reputable sellers before making a purchase. While the watch is widely available, specific regional variations or limited editions might affect individual store availability.

Alternatives to Orient Kamasu Green

The Orient Kamasu Green occupies a competitive space in the mid-range dive watch market. Here are two compelling alternatives to consider, each with its own strengths and weaknesses:

Seiko 5 Sports SRPD51K1 (Black)


  • Renowned Seiko brand heritage and reliability.
  • Similar features like automatic movement, 200m water resistance, and day-date display.
  • Slightly larger case size (42.5mm) for better wrist presence.
  • Generally available at a similar price point.


  • Less striking dial design compared to the Kamasu Green’s sunburst finish.
  • Hardlex crystal (not as scratch-resistant as sapphire).
  • Bezel might not be as smooth and precise as the Kamasu’s.

Citizen Promaster Diver NY0040-09E (Blue)


  • Eco-Drive technology, powered by light and eliminating battery changes.
  • Highly legible and functional dial design with large hands and indices.
  • Impressive value proposition, often found at a lower price point than the Kamasu Green.


  • Automatic movement with a shorter power reserve (around 40 hours) compared to the Kamasu’s (40 hours).
  • Mineral crystal (less scratch-resistant than sapphire).
  • Bulkier case size (44mm) that might not suit all wrist sizes.

Ultimately, the best choice between these alternatives and the Orient Kamasu Green depends on your individual preferences and priorities. Consider factors like:

  • Design aesthetic: Do you prefer the sunburst green dial of the Kamasu or the more classic and functional styles of the Seiko and Citizen?
  • Movement and features: Do you prioritize the convenience of Eco-Drive technology (Citizen) or the longer power reserve of the automatic movements (Seiko and Orient)?
  • Price and value: How important is a specific price point, and which watch offers the best features and materials for your budget?

By carefully weighing these factors, you can make an informed decision and select the dive watch that best suits your needs and style.

Orient Kamasu Green vs. Competitor Comparison


  • Kamasu Green: Eye-catching sunburst green dial with applied silver indices and hands. Offers a unique and vibrant aesthetic, suitable for those who appreciate a bolder style.
  • Seiko 5 Sports SRPD51K1 (Black): Classic black dial with a more traditional dive watch look. Features white hands and indices for clear legibility. Appeals to those who prefer a timeless and straightforward design.


  • Both watches share core features like automatic movements, 200m water resistance, unidirectional bezels, and day-date displays.
  • Kamasu Green: Boasts a sapphire crystal for superior scratch resistance.
  • Seiko 5 Sports SRPD51K1 (Black): Uses a Hardlex crystal, which is less scratch-resistant but slightly more shatter-resistant than sapphire.


  • Both watches offer reliable timekeeping with their respective automatic movements.
  • Kamasu Green: Slightly longer power reserve (40 hours) compared to the Seiko (38 hours).
  • Both watches exhibit good lume brightness and functionality underwater and in low-light conditions.

Value for Money

  • Both watches fall within a similar price range, making value perception subjective.
  • Kamasu Green: Offers a sapphire crystal and superior scratch resistance, potentially justifying its price for some users.
  • Seiko 5 Sports SRPD51K1 (Black): Offers the heritage and reliability of the Seiko brand, which might be a deciding factor for some buyers.

The choice between the Orient Kamasu Green and the Seiko 5 Sports SRPD51K1 boils down to personal preference and what you prioritize in a dive watch.

Choose the Kamasu Green if you:

  • Value a unique and vibrant aesthetic.
  • Prioritize scratch resistance with a sapphire crystal.
  • Appreciate a slightly longer power reserve.

Choose the Seiko 5 Sports SRPD51K1 if you:

  • Prefer a classic and timeless dive watch design.
  • Value the reputation and heritage of the Seiko brand.
  • Find a slightly lower price point appealing.

Water Resistance of Orient Kamasu Green

The Orient Kamasu Green boasts a 200-meter (20 ATM) water resistance rating, making it suitable for various water-related activities. However, it’s crucial to understand what this rating truly signifies and its limitations.

Water resistance ratings are not absolute guarantees of performance at specific depths. They represent the pressure a watch can withstand in static water conditions during a controlled test. Real-world scenarios like sudden movements, temperature changes, and water currents can impact a watch’s performance, exceeding the intended pressure it can handle.

Kamasu Green’s Suitability

Therefore, while the 200-meter rating makes the Kamasu Green suitable for:

  • Swimming: Ideal for recreational swimming, including pool use and casual ocean dips.
  • Snorkeling: Safe for shallow snorkeling, staying within recommended depths and avoiding strong currents.
  • Recreational diving: Can be used for recreational scuba diving up to 130 feet (40 meters), adhering to diving guidelines and professional supervision.

However, it’s not recommended for:

  • Saturation diving: The Kamasu Green lacks features and certifications required for professional deep-sea diving.
  • High-impact water activities: Avoid water sports with significant splashes or high jumps, as these can exceed the watch’s pressure tolerance.
  • Exposure to extreme temperatures: Sudden temperature changes can affect the watch’s seals and compromise water resistance.

Maintaining Water Resistance

To ensure optimal water resistance, it’s essential to:

  • Rinse the watch with fresh water after saltwater exposure.
  • Avoid exposing the watch to chemicals or harsh detergents.
  • Have the watch’s seals and gaskets inspected and potentially replaced periodically by a qualified watch technician.

By understanding the nuances of water resistance and following proper care guidelines, you can ensure your Orient Kamasu Green remains a reliable companion for various water adventures.

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Bracelet and Strap Options

The Orient Kamasu Green comes equipped with a solid stainless steel bracelet. While functional and durable, it might not suit everyone’s preferences regarding weight, comfort, or style. Fortunately, the watch offers ample customization options with various bracelet and strap alternatives.

Stainless Steel Bracelets

Original Orient bracelet: The watch comes with a 3-link stainless steel bracelet with a solid fold-over clasp and double push-button safety. It’s a reliable and secure option, but some users find it slightly bulky or lacking in refinement.

Aftermarket bracelets: Several reputable brands offer high-quality stainless steel bracelets specifically designed for the Kamasu Green. These can offer various styles, finishes, and sometimes, improved comfort compared to the original bracelet. Popular options include brands like Strapcode, MiLTAT, and Crafter Blue.

Leather Straps

Genuine leather: A classic choice that offers a sophisticated and versatile look. Leather straps come in various colors and textures, allowing you to personalize the watch’s style. However, leather is not ideal for water activities as it can absorb moisture and deteriorate over time.

Rubber straps: Provide a sporty and comfortable option, suitable for water wear. They are also less susceptible to wear and tear compared to leather. Consider brands like Hirsch or Barton for high-quality rubber straps.

Nylon NATO straps

Popular for their durability, affordability, and lightweight feel. NATO straps offer a casual and adventurous aesthetic, perfect for everyday wear. They are also quite comfortable and dry quickly after water exposure.

The best choice for you depends on your individual needs and preferences. Here are some factors to consider:

  • Lifestyle: If you plan on using the watch for water activities, prioritize water-resistant materials like rubber or nylon.
  • Comfort: Consider the weight and material of the strap or bracelet. Leather might feel luxurious but can be heavier, while a well-made stainless steel bracelet can be surprisingly comfortable.
  • Style: Choose a material and color that complements your personal style and the occasions you intend to wear the watch for.

By exploring the available options and considering these factors, you can personalize your Orient Kamasu Green and ensure it perfectly reflects your style and needs.

Dial Variations and Modifications

Dial Variations

While the sunburst green dial is the most recognizable version of the Orient Kamasu, the watch has actually been offered in several other dial color variations over time. These include:

  1. Blue: A captivating blue dial with a similar sunburst effect, offering a cool and refreshing alternative to the green.
  2. Black: A classic and versatile option, providing a clean and sophisticated look.
  3. Gray: A more subtle and understated option, offering a touch of elegance.
  4. Red: A bold and eye-catching option, ideal for those who prefer a statement piece.

These variations might not be readily available at all retailers, but they showcase the versatility of the Kamasu’s design and cater to diverse style preferences.


The Orient Kamasu Green enjoys a moderate following among watch enthusiasts who appreciate its affordability and mod-friendliness. This means there are aftermarket parts and accessories available that allow for some level of customization. However, it’s important to note that extensive modifications can potentially affect the watch’s water resistance and warranty.

Here are some common modification options:

  • Strap/bracelet replacements: As discussed earlier, numerous strap and bracelet options exist, allowing you to completely change the watch’s look and feel.
  • Bezel inserts: Some aftermarket options offer different bezel insert colors or materials, like ceramic, for a personalized touch.
  • Crystal replacements: While not as common, some watchmakers might be able to replace the sapphire crystal with a different material like domed acrylic or mineral crystal.
  • It’s crucial to carefully research and choose reputable sources for modifications to ensure quality and avoid compromising the watch’s integrity.

Ultimately, the Orient Kamasu Green, with its various dial options and potential for customization, offers a compelling package for those seeking a stylish and versatile dive watch at an accessible price point.

Movement of Orient Kamasu Green

The Orient Kamasu Green features the Orient Caliber F6922, an in-house automatic movement manufactured by Orient, a subsidiary of the Seiko Epson Corporation. This movement is known for its balance of affordability, reliability, and decent performance.

How it works

The F6922 is an automatic movement, meaning it derives its power from the natural movements of your wrist. As you wear the watch, an oscillating weight (rotor) inside the movement rotates, winding the mainspring, which stores the energy used to power the watch’s functions.

This movement also boasts the following features:

  • Hand-winding: Allows you to manually wind the mainspring for additional power reserve if the watch hasn’t been worn for a while.
  • Hacking: Stops the second hand when you pull the crown out to set the time, ensuring precise time setting.
  • 21,600 vibrations per hour (vph): This is a common frequency for automatic movements in this price range, contributing to smooth sweeping of the second hand.

Accuracy and Reliability

Orient claims the F6922 has an accuracy of +25/-15 seconds per day. This means the watch might gain or lose a few seconds per day under normal conditions. While not the most precise movement, it’s acceptable for a watch in this price range.

The F6922 has gained a reputation for decent reliability among users, known for lasting for years with proper care. However, it may not match the high-precision standards of more expensive movements from established Swiss brands.

Maintenance Requirements

Like any mechanical watch, the F6922 requires regular maintenance to ensure optimal performance and longevity. While the exact service interval depends on usage and environmental factors, a professional watchmaker typically recommends servicing the movement every 5-7 years. During this service, the watchmaker will thoroughly clean and lubricate the movement, replacing worn-out parts if necessary.

Overall, the Orient Caliber F6922 offers a solid balance of affordability, reliability, and functionality for everyday wear. It might not be the most precise movement on the market, but it provides decent performance and value proposition for the price, making the Orient Kamasu Green an attractive option for those seeking a reliable and stylish automatic dive watch.

User Experiences with Orient Kamasu Green

Based on user reviews and testimonials, the Orient Kamasu Green garners positive feedback for several aspects, but also has some shortcomings to consider:


  • Excellent value for money: Users consistently praise the watch’s affordable price compared to its features and quality.
  • Stylish and unique design: The sunburst green dial and overall design are often commended for being eye-catching and visually appealing.
  • Solid build quality: The stainless steel case and sapphire crystal are appreciated for their durability and scratch resistance.
  • Reliable automatic movement: Users report the in-house Orient movement to be generally reliable and accurate for everyday wear.
  • Comfortable wearability: The watch is often described as lightweight and comfortable on most wrist sizes.


  • Slightly bulky bracelet: Some users find the original stainless steel bracelet to be a bit bulky or lacking in refinement.
  • Limited lume brightness: While functional, the lume brightness might not be as strong or long-lasting as some users would prefer.
  • Day-date window: Not all users appreciate the day-date window, finding it to break the watch’s clean aesthetic.
  • Limited brand recognition: Compared to established Swiss brands, Orient might have less brand recognition for some potential buyers.
  • It’s important to remember that these are general observations based on user reviews, and individual experiences might vary.

Overall, the Orient Kamasu Green seems to be a well-received dive watch, particularly appreciated for its affordability, stylish design, and reliable performance. However, potential buyers should be aware of its shortcomings, such as the potentially bulky bracelet and limited lume, to make an informed decision.

Ensuring Authenticity of Orient Kamasu Green

Unfortunately, the increasing popularity of the Orient Kamasu Green has also led to the emergence of counterfeit versions in the market. Here are some tips and guidelines to help you ensure the authenticity of your Orient Kamasu Green:

Purchase from Authorized Retailers:

The safest approach is to purchase the watch from authorized Orient retailers or reputable online watch stores. These retailers will have a proven track record of selling genuine products and often offer guarantees of authenticity.

Physical Inspection:

If you’re buying from a non-authorized retailer or an individual seller, carefully inspect the watch for signs of inauthenticity. Here are some key points to check:

Overall build quality: The watch should feel solid and well-made, with no loose parts or misaligned finishes.

Engravings and markings: The watch should have clear and crisp engravings on the case back, crown, and clasp. These engravings should match the specifications of the genuine model. You can find detailed pictures of genuine Orient Kamasu Green engravings online for comparison.

Crystal: The genuine Kamasu Green features a sapphire crystal. You can test the hardness of the crystal by gently touching it with a pointed object. Sapphire is highly scratch-resistant and should not show any marks from this test. (Important Note: This test should be done with extreme caution to avoid accidentally damaging the crystal.)

Movement: The watch should have the Orient Caliber F6922 movement. While you cannot physically see the movement without opening the watch case, you can check the model number engraved on the case back and match it with the specifications of the genuine Orient Kamasu Green.

Warning Signs of Counterfeits:

  • Unusually low price: If the price of the watch seems significantly lower than the typical retail price, it’s a strong indication of a potential fake.
  • Poor quality materials and craftsmanship: Counterfeit watches often use inferior materials and exhibit poor craftsmanship, with visible defects or inconsistencies in finishing.
  • Packaging and documentation: The watch should come with original packaging and documentation, including a warranty card and instruction manual. These materials should be free of typos or grammatical errors and match the branding of Orient watches.

Additional Resources:

You can also refer to Orient’s official website for information on authorized retailers and resources to help identify genuine products.

Online watch forums and communities can be valuable resources for getting advice and insights from experienced watch enthusiasts regarding watch authenticity.

Remember, if you have any doubts about the authenticity of a watch, it’s best to err on the side of caution and avoid making the purchase. By following these tips and doing your due diligence, you can increase your chances of acquiring a genuine Orient Kamasu Green and enjoying your timepiece for years to come.

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In Crux

The Orient Kamasu Green has established itself as a compelling option in the mid-range dive watch market. It offers a unique and visually striking design with its sunburst green dial, combined with decent functionality and reliable performance.

Overall, the Orient Kamasu Green presents an attractive package for watch enthusiasts seeking a stylish, functional, and affordable dive watch. While it might not boast the prestige of established Swiss brands, it offers excellent value for the price, making it a strong contender in its category.

Ultimately, the decision to choose the Orient Kamasu Green depends on your individual preferences and priorities. Consider the watch’s strengths and weaknesses, compare it to other options in your budget, and make an informed decision that best suits your needs and style.

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