Sterile 6BB–The ‘Lost’ Navigator
From Chronopedia
The 1976 MOD issued Sterile 6BBwatc his somewhat of a mystery to collectors of modern British military watches. It’s cousins, the Hamilton and CWC tonneau-shaped W10 General Service watches are well-known and easily identified. See here for more information on these models:
Credits - https://www.dbaswithguns.com/Imgs/Sterile_6BB_The_Lost_Navigator.pdf