View source for Sterile 6BB–The ‘Lost’ Navigator

[[File:6bb sterile.jpg|thumb|Sterile 6BB–The ‘Lost’ Navigator - Credit MBRADIO MWR]]
==Sterile 6BB–The ‘Lost’ Navigator==
The 1976 MOD issued Sterile 6BB watch is 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:
* [[Hamilton W10]]
* [[CWC W10 1976-1980]]
The [[CWC G10 navigator]] was the logical next model and the quartz version replaced this 6BB version around 1980. 

==Features==
* Case is W10 tonneau shaped of monobloc construction
* Movement is only accessible from the front through the crystal
* The size is similar to Hamilton and CWC W10’s (but not exactly)
* It was only issued in 1976
* Approximately 2,000 were issued
* The dial and case are sterile e.g no manufacturer’s name or logo is applied
* Dial design is almost identical to DEF STAN 66-4(Part 5) Issue 2, Figure 1, Page 8
* The inside of the case bears no markings
* 6BB prefix would indicate it was to be issued to the Royal Air Force

==Movement==
The movement in the sterile 6BB has been identified as being based on the A.Schilds AS 2160 17 jewel manual wind, 28,800 bph, but with a micrometer type of adjuster replacing the normal regulator. The micro adjuster appears to be very similar to that used on the Valjoux 7750 movement.
It also has a hacking mechanism rarely seen in the AS movement and thought to be specially made for this watch.

==Links==
* [[CWC]]
* [[Hamilton]]
* [[Military Watches]]
* [[Main Page]]



Credits - https://www.dbaswithguns.com/Imgs/Sterile_6BB_The_Lost_Navigator.pdf