1960s Hamilton Rare Mk11 British Military Issue Wristwatch Model 6BThis Watch The Hamilton 6Bs were issued to the British Royal Air Force from the mid 1960s through to the mid 1970s, and a few versions were produced. The 6B 9101000 was not the rarest of those produced, but it is a favourite among collectors because of the Broad Arrow and 'T' stamped on the dial. It is a fantastic military piece for those looking to begin their collection (as well as a great addition to an already growing one!) as it does