Kamasu RA-AA0825S Orient's sapphire diver comes back in white

What is new about the Orient Kamasu RA-AA0825S?

The Kamasu is the nickname collectors gave to the Orient Mako III diver, and Orient now uses it in its own copy. For autumn and winter 2026 the model returns with four new dials: blue (RA-AA0824L), white (RA-AA0825S), orange (RA-AA0826Y) and a limited purple edition (RA-AA0827V). WatchNation covered the return on 17 August 2026 and put it plainly: the story is not a new case or movement but "the return of a design people already liked".

This first look is about the white version. Orient UK describes it as the popular Kamasu diver design returning in a new silver dial colour, and lists a white dial, an Orient logo and a day and date window at 3 o'clock. WatchNation says the white model is exclusive to it among UK retailers, and Orient also sells it through its own UK store. The RRP on Orient UK is £424.99, the same as the other three colours.

A white dial is unusual in this part of the dive watch market, where black and blue still dominate. Paired with the broad bar markers and the familiar Mako handset, it should read cleanly in daylight and look less tool-like than the darker versions.

How big is it, and how will it wear?

Orient quotes a case width of 41.8 mm, a lug to lug length of 46.8 mm and a thickness of 12.8 mm, with a 22 mm lug width. Those are modest numbers for a 200 m diver. The short lug to lug matters most: at under 47 mm, the case should sit inside the edges of most wrists, including slimmer ones that struggle with 44 mm divers.

The Slender Wrist, writing about the previous Kamasu with identical dimensions, says the watch "still wears pretty comfortably" despite a confident stance on the wrist, and credits the folded end links for hugging the wrist. At 12.8 mm thick it will fit under most shirt cuffs, though it is not a slim watch.

What movement does it use, and how accurate is it?

Inside is Orient's in-house automatic calibre F6922, with 22 jewels, hand winding, hacking seconds and a power reserve of 40 hours, according to Orient UK. Hand winding and hacking were the big upgrades when this calibre arrived, and they make the watch easier to set precisely and to start from a stop.

Accuracy is the weak point. WatchNation quotes a tolerance of +25 to -15 seconds a day, which is typical for an entry-level automatic but loose next to quartz or a regulated Swiss movement. Fratello, writing about an earlier Kamasu, called accuracy the watch's "weakest link" while accepting it for the money. Expect to reset it every week or two if you wear it daily.

How well is it built?

The specification is strong for the price. Orient lists a stainless steel case, a screw-down crown, sapphire crystal and 200 m water resistance. WatchNation adds a 120-click unidirectional bezel. Sapphire is the detail that first made the Kamasu popular: many rival divers in this bracket still use mineral glass.

Reviewers of the earlier version agree on two niggles. The crown is small and sits between guards, which makes it fiddly to unscrew and wind. The bracelet is comfortable but not refined, with The Slender Wrist noting it "does rattle slightly" and Fratello calling the stamped clasp the main place where costs were cut. Nothing in Orient's 2026 copy suggests either has changed.

Is it good value against its rivals?

This is where the 2026 Kamasu is harder to recommend than the old one. Fratello reported a list price of $280 for the earlier model; the new RRP of £424.99 puts it well into the £300 to £600 band, with the same case and movement.

The most obvious rival is Orient's own Mako 40, which Orient UK lists at £379.99 and which offers a smaller case for less money. Outside the family, the Citizen Promaster Dive BN0261-51E is listed by Goldsmiths at £369. It is a 40.55 mm solar diver with sapphire and an ISO 6425 rating, and it never needs winding. Against those, the Kamasu's case is the selling point, not its price.

What is the catch?

The catch is that you are paying 2026 money for a design that has not moved on. The F6922 is robust and serviceable, but its accuracy tolerance and 40-hour reserve are modest, and the crown and clasp complaints from earlier owners remain. If you have wanted a Kamasu with a light dial, though, this is the version to look at, and a white dial on a sapphire diver of this size is still rare.

• Reference: RA-AA0825S
• Case: 41.8 mm stainless steel, 12.8 mm thick, 46.8 mm lug to lug
• Movement: Orient F6922 automatic, 40 hours
• Water resistance: 200 m
• RRP: £424.99 (Orient UK)

“A white dial on a sapphire diver this size is still rare; the price is what has really changed.”

What do owners say?

Themes from public owner feedback, paraphrased. We never copy Amazon reviews or ratings.

• Reviewers of the previous Kamasu: the crown is small and fiddly to screw down

  The Slender Wrist (opens in a new tab)

• Reviewers of the previous Kamasu: the bracelet is comfortable but rattles, and collectors want it refined

  The Slender Wrist (opens in a new tab)

• Reviewers of the previous Kamasu: lume and sapphire impress, accuracy is the weakest link

  Fratello (opens in a new tab)