AC0Q Diver

Ref. RA-AC0Q11E30B

Case diameter: 39.9 mm; Manufacturer spec
Lug-to-lug: 46.5 mm; Manufacturer spec
Thickness: 12.8 mm; Manufacturer spec
Lug width: 20 mm; Manufacturer spec

Retail price $355 (US, Oct 2026)

Your wristIdeal fit

Wrist flat: 55.1 mmLug-to-lug: 46.5 mm

How the AC0Q Diver wears

Its lugs add 6.6 mm to the 39.9 mm case, close to the 7 mm typical across the almanac, so its diameter is a fair guide to how it wears.

On our fit model it sits best on wrists from 6.5" to 7.75" (16.5–19.7 cm); below 6.5" the lugs start to reach the edge of the wrist.

At 12.8 mm thick it is slimmer than 53% of the 142 other dive watches we've measured, so it slides under a cuff more easily than most.

Its 20 mm lug width is one of the most common strap sizes; 186 other watches here share it, so aftermarket straps are easy to find.

Will the AC0Q Diver fit your wrist?

With a 46.5 mm lug-to-lug, here is how it wears across common wrist sizes. We estimate the flat top of each wrist from its circumference; measure yours for a closer answer in the fit finder.

Wrist	Flat width (est.)	Fit
6"	47.2 mm	Lugs overhang
6.5"	51.2 mm	Ideal fit
7"	55.1 mm	Ideal fit
7.5"	59.1 mm	Ideal fit
8"	63 mm	Wears small

Specifications

Reference: RA-AC0Q11E30B
Collection: Sports
Status: In production
Case material: stainless steel
Crystal: sapphire
Water resistance: 200 m
Bezel: 120-click unidirectional
Dial: green
Strap / bracelet: rubber strap, buckle
Style: Dive

Movement

Caliber: Orient F6722
Type: automatic
Power reserve: 40 hours

Takes 20 mm straps. See other 20 mm watches and straps.

More Sports references

Watches that wear the same size

Other watches within 1.5 mm of its lug-to-lug.

Same 20 mm lug width

All 20 mm watches

These take the same straps as the AC0Q Diver.

Sources

orientwatchusa.com/products/ra-ac0q11e30b