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Orient Mako Kamasu RA-AA0825S39B Watch
The Orient Mako Kamasu RA-AA0825S39B is a men's automatic dive watch with a 41.8 mm diameter. Its 316L stainless steel case, with brushed and polished finishes, features a screw-down crown at 3 o'clock and a screwed solid case back. The unidirectional 120-click bezel with a 60-minute scale and black aluminum insert frames a silver-tone dial with a distinctive finish.
The dial, silver-tone with Ginrin texture, changes tone with the light and plays with whites and shadows across the dial. It features baton indices and silver-tone hands with luminous material, a red-tipped seconds hand and a day and date window at 3 o'clock. The sapphire crystal protects the dial from scratches. The three-link stainless steel bracelet fastens with a deployant clasp with push-buttons and safety lock, and tapers from 22 mm at the lugs to 20 mm at the clasp.
The Orient F6922 in-house movement offers 22 jewels, a 40-hour power reserve and a declared accuracy of +25 to -15 seconds per day. It includes manual winding and hacking. Water resistance is 200 m (20 bar) and magnetic resistance is 4,800 A/m (JIS Type 1). Reference RA-AA0825S39B identifies this Ginrin dial variant within the Mako Kamasu collection.
F6922 Automatic Sapphire 200 m Ginrin Dial Black Aluminum Bezel
Why choose this watch?
The Orient RA-AA0825S39B is an automatic 200 m diver with a 41.8 mm case and sapphire crystal, aimed at those seeking real dive specifications in a contained format. Its Ginrin dial and black aluminum bezel set it apart within the Kamasu collection, while the F6922 calibre with manual winding and hacking brings the versatility of a complete automatic. It is an option for those who prioritise the technical sheet and a sober visual identity, without renouncing a wearable size on the wrist.
Technical specifications
Movement
- Type: automatic (mechanical self-winding).
- Calibre: Orient F6922, in-house.
- Jewels: 22.
- Power reserve: 40 hours.
- Declared accuracy: +25 to -15 seconds per day.
- Functions: hours, minutes, seconds, day and date. Manual winding and hacking.
Case and dimensions
- Reference: RA-AA0825S39B.
- Brand: Orient.
- Collection: Mako Kamasu.
- Case material: 316L stainless steel.
- Finish: brushed and polished.
- Diameter: 41.8 mm.
- Thickness: 12.8 mm.
- Lug to lug: 46.8 mm.
- Lug width: 22 mm.
- Weight: 169 g.
- Crown: screw-down, at 3 o'clock.
- Case back: screwed, solid.
- Water resistance: 200 m (20 bar).
- Magnetic resistance: 4,800 A/m (JIS Type 1).
Dial, bezel, crystal and bracelet
- Dial: silver-tone with Ginrin texture and baton indices.
- Hands: silver-tone, with red-tipped seconds hand.
- Luminescence: on hands and hour markers.
- Bezel: unidirectional, 120 clicks, 60-minute scale, black aluminum insert.
- Crystal: sapphire.
- Bracelet: 316L stainless steel, three links.
- Clasp width: 20 mm.
- Clasp: deployant with push-buttons and safety lock.
- Gender: men.
Frequently asked questions
What is the difference between the Orient Kamasu and the Seiko Prospex Turtle?
Both are 200 m dive watches with a screw-down crown, unidirectional bezel and Japanese movements with hacking and manual winding. The differences lie in their approach. The Kamasu uses a sapphire crystal, declares an accuracy of +25 to -15 seconds per day and offers a more contained 41.8 mm case. The Turtle uses Hardlex crystal, declares -35 to +45 seconds per day and uses a 45 mm cushion-shaped case. The Kamasu wins on specifications and size versatility; the Turtle wins on lume, design character and resale value.
What is the Ginrin finish on the dial like?
The Ginrin finish is a metallic texture that reflects light dynamically. The base tone is silver, but depending on the light, white highlights and shadow areas appear that make the colour seem to change. It is not a flat colour: it is a textured effect that gives the dial depth.
