Orient Kamasu
The black Kamasu: a 41.8 mm 200 m diver with a sapphire crystal, screw-down crown, in-house F6922 automatic and steel bracelet. A sapphire crystal is rare at this price.
In stock · sold by Westlake Watches. Price as of November 3, 2026, 18:15 UTC.
3 versions of the Orient Kamasu
Same case and movement, different dial, bezel or strap. Each line is its own Amazon listing with its own price today; the strap variants earn fewer spec points than the bracelet.
| Reference | Dial / strap | Strap | Spec pts | Price | Value Score | Sales rank | Buy |
|---|---|---|---|---|---|---|---|
RA-AA0001B Best value | Black dial, black bezel | Steel | 83 | $252.60third-party | 61 | #295 | Amazon |
 RA-AA0004E | Green dial, green bezel | Steel | 83 | $288.45third-party | 57 | #295 | Amazon |
 RA-AA0003R | Red dial | Steel | 83 | $263.48third-party | 60 | #699 | Amazon |
Amazon.com prices as of November 3, 2026, 18:15 UTC — details.
Will the Orient Kamasu fit your wrist?
Enter your wrist circumference. The drawing scales the case (41.8 mm across, 46.8 mm lug-to-lug) against the flat top of a wrist that size, using the 3.6× lug-to-lug rule from our fit guide. Needs JavaScript; the rule itself is on the fit guide.
What you get
Published manufacturer specifications. Fields we could not verify are left out rather than guessed.
How the 83 spec points add up
Value Score = 100 × √(spec points per dollar ÷ the best ratio among automatic dive watches in stock on Amazon today). Full methodology.
Compared with other automatic dive watches
Same type, other model families, verified Amazon prices today. See the full Automatic Dive Watches ranking →
| # | Watch | Movement | Crystal | Water res. | Case diameter × lug-to-lug | Fits wrist | Spec pts | Price | Value Score | Buy |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | Automatic (Seiko NH35) | Mineral | 200 m | 40 × 48 mm | ≥ 17.3 cm (6.8″) | 77 | $88.00third-party | 100 | Amazon |
| 2 |  | Automatic (F6922) | Mineral | 200 m | 41.5 × 47 mm | ≥ 16.9 cm (6.7″) | 76 | $213.15third-party | 64 | Amazon |
| 3 |  | Automatic (F6922) | Mineral | 200 m | 41.5 × 47 mm | ≥ 16.9 cm (6.7″) | 76 | $225.20third-party | 62 | Amazon |
| 4 | | Automatic (F6922) | Sapphire | 200 m | 41.8 × 46.8 mm | ≥ 16.8 cm (6.6″) | 83 | $252.60third-party | 61 | Amazon |
| 5 |  | Automatic (F6922) | Sapphire | 200 m | 40 mm | — | 83 | $257.04third-party | 61 | Amazon |
| 6 | Automatic (4R36) | Hardlex | 200 m ISO | 45 × 48 mm | ≥ 17.3 cm (6.8″) | 81 | $485.00third-party | 44 | Amazon | |
| 7 | Automatic (4R35) | — | 200 m ISO | — | — | 72 | $476.00third-party | 42 | Amazon |
Amazon.com prices as of November 3, 2026, 18:15 UTC — details. third-party = sold by a marketplace seller, not Amazon (warranty may differ); ships later = not in stock today, never crowned best value.
Comparisons with the Orient Kamasu RA-AA0001B
Questions about the Orient Kamasu
How much does the Orient Kamasu cost on Amazon?
What is the Value Score of the Orient Kamasu?
What wrist size fits the Orient Kamasu?
What are alternatives to the Orient Kamasu?
22 mm straps that fit the Orient Kamasu
The lug width is 22 mm, so any 22 mm strap fits. These are the straps we list for that width; see the lug width chart for every size and the accessories page for winders, boxes and tools. Full picks with buying notes: Best 22 mm watch straps.
| Item | Kind | Lug width | Price | Buy |
|---|---|---|---|---|
 BISONSTRAP hand-stitched leather, quick release, 22 mm Entry-price leather with quick-release pins. | Leather strap | 22 mm | $14.99third-party | Amazon |
 Berfine oil-tanned pull-up leather, quick release, 22 mm Vintage-look pull-up leather. | Leather strap | 22 mm | $19.98third-party | Amazon |
 Archer military-style nylon, 22 mm, black Heavy nylon; fits Seiko 5 Sports and Kamasu. | Nylon / NATO strap | 22 mm | $19.99third-party | Amazon |
 ANNEFIT one-piece nylon, 22 mm One-piece pass-through strap; adds ~2 mm height. | Nylon / NATO strap | 22 mm | $12.99third-party | Amazon |
 StrapHabit FKM rubber, quick release, 22 mm Fluororubber; the usual replacement for the Casio Duro's resin strap. | Rubber strap | 22 mm | $38.95third-party | Amazon |
 WOCCI ventilated FKM rubber, 22 mm Vented FKM; cooler on the wrist in summer. | Rubber strap | 22 mm | $20.99third-party | Amazon |
 WOCCI 316L steel bracelet, double-locking clasp, 22 mm Inexpensive solid steel bracelet. | Steel bracelet | 22 mm | $28.99third-party | Amazon |
Amazon.com prices as of November 3, 2026, 18:15 UTC — details. Accessories have no Value Score; they are listed for fit, not ranked.
Guides that apply to this watch
- Ranked among watches under $300
- What the water-resistance rating actually permits
- Sapphire vs Hardlex vs mineral: what the crystal changes
- Lug width and strap sizing
- Will it fit your wrist? The lug-to-lug rule
- Automatic vs solar vs quartz: accuracy and running cost
- Watch gift guide by budget and recipient
- Buying a watch on Amazon: sellers, warranty, returns