Helmsman SS 'Carbon'

Case diameter: 40 mm; Manufacturer spec
Lug-to-lug: 46.5 mm; Manufacturer spec
Thickness: 12.5 mm; Manufacturer spec
Lug width: 20 mm; Manufacturer spec

Retail price $699 (US, Oct 2026)

Your wristIdeal fit

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

How the Helmsman SS 'Carbon' wears

Its lugs add 6.5 mm to the 40 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 12.5 mm thick it is slimmer than 65% of the 124 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; 156 other watches here share it, so aftermarket straps are easy to find.

Will the Helmsman SS 'Carbon' 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: Helmsman SS 'Carbon'
Collection: Helmsman
Status: In production
Introduced: 2026
Case material: 316L stainless steel
Crystal: box sapphire
Water resistance: 200 m
Bezel: internal carbon rotating bezel
Dial: forged carbon 'Tidal' guilloche
Strap / bracelet: brushed beads-of-rice bracelet with quick-adjust clasp
Style: Dive, Sport

Movement

Caliber: Miyota 9015
Type: automatic
Power reserve: 42 hours
Frequency: 28,800 vph (4 Hz)
Jewels: 24

4 other watches use the Miyota 9015

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 Helmsman SS 'Carbon'.

Sources

zeloswatches.com/products/helmsman-ss-carbon