Type 1 Mil Spec

Ref. T1MS-SS-B-395-01

Case diameter: 39.5 mm; Manufacturer spec
Lug-to-lug: 47.7 mm; Manufacturer spec
Thickness: 14.4 mm; Manufacturer spec
Lug width: 20 mm; Manufacturer spec

Retail price $1,795 (US, Oct 2026)

Your wristIdeal fit

Wrist flat: 55.1 mmLug-to-lug: 47.7 mm

How the Type 1 Mil Spec wears

Its lugs add 8.2 mm to the 39.5 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 6.75" to 8" (17.1–20.3 cm); below 6.75" the lugs start to reach the edge of the wrist.

At 14.4 mm thick it is thicker than 86% 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 Type 1 Mil Spec fit your wrist?

With a 47.7 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: T1MS-SS-B-395-01
Collection: Type I
Status: In production
Introduced: 2025
Case material: sandblasted 316L stainless steel
Crystal: double-domed sapphire, double AR
Water resistance: 365 m
Bezel: bidirectional, sandblasted steel with aluminium inner ring
Dial: black
Strap / bracelet: black rubber strap with pin buckle
Style: Dive

Movement

Caliber: ETA 2892
Type: automatic
Power reserve: 42 hours

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 Type 1 Mil Spec.