Watch Almanac
Orient

M-Force

Ref. RA-AC0L01B · “M-Force”

Case diameter
45 mm
Manufacturer spec
Lug-to-lug
52 mm
Manufacturer spec
Thickness
13.2 mm
Manufacturer spec
Lug width
20 mm
Manufacturer spec

Retail price $605 (US, Oct 2026)

Snug, lugs near the edge
Wrist flat: 55.1 mmLug-to-lug: 52 mm

How the M-Force wears

Its lugs add 7 mm to the 45 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 7.25" to 8.5" (18.4–21.6 cm); below 7.25" the lugs start to reach the edge of the wrist.

At 13.2 mm thick it is thicker than 60% of the 124 other dive watches we've measured, so expect it to sit tall on the wrist.

Its 20 mm lug width is one of the most common strap sizes; 156 other watches here share it, so aftermarket straps are easy to find.

Will the M-Force fit your wrist?

With a 52 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.

WristFlat width (est.)Fit
6"47.2 mmLugs overhang
6.5"51.2 mmLugs overhang
7"55.1 mmSnug, lugs near the edge
7.5"59.1 mmIdeal fit
8"63 mmIdeal fit

Specifications

Reference
RA-AC0L01B
Collection
Sports
Status
In production
Case material
stainless steel (SUS316L), grey-plated bezel
Crystal
flat sapphire (AR coating)
Water resistance
200 m
Bezel
unidirectional diver's bezel
Dial
black
Strap / bracelet
stainless steel bracelet, trifold deployant buckle with push button and security latch
Weight
206 g
Style
Dive, Sport

Movement

Caliber
Orient F6727
Type
automatic
Power reserve
40 hours
Jewels
22
Accuracy
+25/-15 s/day

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 M-Force.

Sources