1975 Hamilton Rare 6BB-6645-99 Royal Air Force British Military Issue Mechanical Wristwatch with Hacking SecondsThis Watch We have here a very exciting and rare Hamilton 6BB from 1975. It is estimated that only 2000 6BBs were issued to the RAF between 1973 and 1976. The front loading monocoque, 35mm, brushed stainless steel, tonneau shaped case is a comfortable wear on the wrist. The case back is engraved '6BB 6645 99 523 8290 7026 75' with the Broad Arrow, and, as with all military watch, has fixed lugs. Inside is the mechanical manual wind Hamilton caliber