MWC Titanium Military Watch, 300m Water Resistant, Sapphire Crystal and 10 Year Battery Life - NATO NSN Number: 6645-99-847-7565

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MWC Titanium Military Watch, 300m Water Resistant, Sapphire Crystal and 10 Year Battery Life - NATO NSN Number: 6645-99-847-7565SKU Code: T LTD 2 NATO Titanium G10 NATO Spec Military Watch This custom made titanium G10 was built for a NATO military procurement company and carries the official NATO Stock Number (NSN 6645 99 847 7565), engraved on the caseback by the UK MoD codification agency. Designed to withstand demanding conditions, it features: Titanium case lighter and stronger than steel Swiss Ronda 715li quartz movement 10 year battery life Sapphire crystal with anti

and two earlier standards: Def Stan 66-15 (Part 1) Issue 1 – Strap (Nylon) dated 30 November 1973

The caseback carries individual contract markings

The reason that sapphire crystals are so strong is that after the sapphire glass is manufactured it is also heat-treated to remove its internal stresses—which can cause weakness—it is then made into the watch crystals and two layers of anti-reflective coating are applied

A group of military watch enthusiasts has compiled a list of these manufacturers

Case thickness: 13

This combination makes it the ultimate timepiece for military

There were a large number of manufacturers

the straps are also extremely hard-wearing and robust

Superior Strength: Sapphire crystal is extremely strong and highly resistant to shattering and scratches

The P656 series traces its heritage to the MIL-W-46374F military specification

Sapphire crystal is superior to standard mineral crystal due to its strength

Weight: 73g

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