1960's issued RAF Hamilton 6B Navigation watch.

Got this some years ago for a fair price due to MOD sloppy touch up relume. This was the first model that did not hack. A later Hamilton 6B model did hack 36mm case with antimagnetic cover over movement. The Americans only had one comparable the Hamilton FAPD 5101 navigation watch only made one month Sept 1970 same case with a hacking movement with the American style dial and hands a rare one when you can find one there also an Australian issued FAPD even less than the American one those are not cheap. The Hamilton 6B they made more of and still can be found if you want one.