MWC W10 1970s Pattern Quartz Watch with Ronda 515 Movement - NATO Stock Number 6645-99-541-5317

SKU Code: W10B/515 The MWC W10B/515 combines the distinctive appearance of the original hand-wound W10 with the accuracy and convenience of a modern Ronda 515 quartz movement. The watch has a compact satin-finished stainless steel case, black dial and Admiralty Grey NATO strap preserve the character of the original military design. A Design Rooted in British Military Watchmaking The original hand-wound W10 preceded the quartz G10 watches introduced into British military service in 1980. At the time, plans to incorporate a quartz movement into the W10 case pattern were limited by the thickness of the movements available. A different case design was required, helping shape the G10 watches that followed. That lineage continues with the modern MWC G10 models supplied to the British Army through military procurement contractors. The final two images in this listing reproduce a government specification sheet dated February 1980, inviting tenders for the W10 case pattern. Today’s slimmer quartz movements make it possible to revisit that original concept while retaining its distinctive proportions. Revived for a Military Procurement Requirement This model was developed following a request from a military procurement contractor for a substantial quantity of watches based on the original design. NATO codification was a requirement of the project. Following discussions with the MOD codification agency, it was agreed that the watch could use the original NATO Stock Number, 6645-99-541-5317. Apart from the modern movement and the addition of a screw-down locking crown, the watch remains essentially faithful to the specification originally requested. The NSN is engraved on the caseback. Traditional Character with Quartz Accuracy The Ronda 515 quartz movement is rated at −10 to +20 seconds per month. That averages approximately −0.33 to +0.67 seconds per day. The battery life is 45 months. A hacking function stops the seconds hand when setting the time, allowing precise synchronisation. Practical, Understated Construction The case is manufactured from 316L stainless steel with a satin finish. A black dial with luminous markings provides clear readability, while the acrylic crystal retains the traditional appearance of the W10 design. A screw-down locking crown complements the watch’s 50-metre water resistance. Each watch is supplied with an 18mm Admiralty Grey heat-welded NATO webbing strap and a presentation tin. Specifications Case diameter: 35mm excluding crown; 37mm including crown Thickness: 12mm Dial: Black with luminous markings Case material: 316L stainless steel Caseback: 316L stainless steel Crown: 316L stainless steel, screw-down locking Movement: Ronda 515 Battery Life: 45 Months Accuracy: Average ±15 seconds per month at normal temperatures Functions: Hours, minutes, sweep seconds and hacking Crystal: Acrylic (Plexiglass/Perspex) Water resistance: 5 ATM / 50m Strap: 18mm Admiralty Grey heat-welded NATO webbing NATO Stock Number: 6645-99-541-5317, engraved on the caseback Packaging: Supplied in a presentation box