1521 Militaire (bracelet)

Ref. 1521MIL.SQ20B

Case diameter: 42 mm; Manufacturer spec
Lug-to-lug: 48 mm; Manufacturer spec
Thickness: 12.5 mm; Manufacturer spec
Lug width: 20 mm; Manufacturer spec

Retail price $1,510 (US, Oct 2026)

Your wristIdeal fit

Wrist flat: 55.1 mmLug-to-lug: 48 mm

How the 1521 Militaire (bracelet) wears

Its lugs add 6 mm to the 42 mm case, close to the 7.1 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 6.75" to 8" (17.1–20.3 cm); below 6.75" the lugs start to reach the edge of the wrist.

At 12.5 mm thick it is slimmer than 65% of the 79 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; 104 other watches here share it, so aftermarket straps are easy to find.

Will the 1521 Militaire (bracelet) fit your wrist?

With a 48 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	Snug, lugs near the edge
7"	55.1 mm	Ideal fit
7.5"	59.1 mm	Ideal fit
8"	63 mm	Ideal fit

Specifications

Reference: 1521MIL.SQ20B
Collection: 1521
Status: In production
Case material: 316L stainless steel
Crystal: flat sapphire, anti-reflective
Water resistance: 500 m
Bezel: unidirectional, aluminium insert
Dial: black
Strap / bracelet: brushed steel bracelet
Style: Dive

Movement

Caliber: Sellita SW200-1
Type: automatic
Power reserve: 38 hours
Frequency: 28,800 vph (4 Hz)
Jewels: 26
Accuracy: -5/+12 s/day (Christopher Ward tolerance)

2 other watches use the Sellita SW200-1

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

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 1521 Militaire (bracelet).