CWC G10, Mellor-72 and SBS Diver: which military watch makes sense for you?

CWC’s military identity can make its watches look like variations on a single idea: dark dials, pale markings and pass-through straps. The current G10, Mellor-72 and SBS Issue Diver actually ask three different things of their owner. The G10 prioritises convenient quartz timekeeping; the Mellor-72 makes winding part of ownership; the SBS adds a timing bezel, day/date and a substantially higher water-resistance rating. These are existing catalogue models, not three newly announced releases.

The British Military G10, item 80034, is the least expensive of this trio at CWC’s checked UK listing of £299. Its ETA F06.402 quartz movement sits behind a no-date dial, inside a 36.5mm case measured without the crown. CWC quotes 38mm including it. Hesalite acrylic, a 5 ATM rating and a battery hatch make this a different proposition from a modern sapphire-equipped sports watch. The hatch is a service convenience, not an invitation to assume a watch remains pressure-tested after a battery change.

The G10’s uncluttered dial makes sense if reading the time is the whole brief. In the official photographs the large Arabic numerals and minute track dominate; there is no calendar aperture competing with them. Fixed bars mean choosing a compatible pass-through strap rather than expecting an ordinary two-piece strap to fit. CWC supplies an 18mm strap. Its military supply history should not be confused with proof that a particular retail example was issued to a service member.

The Mellor-72, item 15411, costs £599 on the checked UK page. Its Sellita SW210 is hand-wound, with hacking seconds and a stated reserve above 40 hours. CWC gives the case width as 38mm including the crown, with 42mm lug-to-lug and 11mm thickness including the crystal. The broad tonneau-shaped shoulders make its silhouette noticeably different from the G10. Both retain acrylic and a 5 ATM rating, so the extra £300 buys a different movement and case character rather than an increase in the published water-resistance figure.

That is the meaningful decision between the field watches. Choose the G10 if you want to pick it up without winding it. Choose the Mellor-72 if manual winding is itself part of the appeal. Neither preference proves one watch more authentic or more useful. The Mellor’s dial retains historical markings while CWC specifies contemporary Super-LumiNova; a printed historical symbol should not be used to infer the luminous material. Its 18.5mm fixed bars accommodate the supplied 18mm strap.

The SBS Issue Diver, item 80028 and designation SF300 QS120-DD, moves the comparison towards equipment rather than winding ritual. At the checked £799 UK listing, it combines Ronda 517 quartz day/date with sapphire, a black PVD case, screw-down crown and back, and a manufacturer-stated 300m water-resistance rating. The case is 41mm without its crown, 45mm including it and 47mm lug-to-lug. CWC lists a 120-click bezel and a 20mm strap on fixed bars.

Those measurements matter more than the shared military vocabulary: the SBS is broader and longer than the compact field-watch proposition, and CWC quotes 70g without a strap versus 40g for each field watch. The day/date trades some dial simplicity for useful information. The bezel introduces elapsed-time reading without adding chronograph subdials. These are specification and design observations, not wrist-fit, timing, lume or diving test results.

For a buyer comparing costs, the SBS adds £200 over the Mellor while returning to quartz; mechanical movement alone is therefore a poor way to rank this range. The G10 is the direct choice for a compact no-date quartz field watch, the Mellor for manual-wind engagement, and the SBS for the bezel, calendar and higher published depth rating. Readers considering CWC’s more expensive automatic interpretation can also compare our Navy Eighty CD-1 guide.

Research method: official CWC product descriptions, structured catalogue records and nine model-specific gallery photographs checked on 8 November 2026. Prices are the UK listings observed that day, not delivered Belgian prices or a promise of stock. CWC product-page publication timestamps are retained as source dates, not asserted as launch dates; the present configurations’ exact release dates remain unverified. This is desk-based comparison without hands-on access or independent testing of manufacturer specifications.