Hamilton FAPD 5101 navigation wrist watch was issued to USAF navigators during the Vietnam war and shortly after, they are quite rare and very desirable. But this isn’t one of them; this is the much more rare Australian Air Force issue version
The movement is a Hamilton cal 684 (which is actually an ETA 2391) with 17 jewels; it is jeweled to the center wheel and has a direct drive sweep seconds hand.
The movement is protected from magnetic influences by a Faraday cage comprising a soft iron movement ring, removable movement cover and an extra thick dial.
The dial is matt black with small luminous inverted triangle marking each of the 12 hour positions, position The dial also has full Arabic numbers in white. The dial is unsigned, apart from a tiny “Swiss” below the outer minute track. The hands are white painted skeleton leaf shaped with needle points and heavy tritium infill; obviously after all this time the luminous no longer functions.
The case has an unusual construction with an annular recess in the case body into which the gasket fits, rather than the more common method of placing the gasket on the case back. The inside of the case back is signed “Hamilton Watch Co Swiss Made”; the case back is signed with Austrailan Air Force issue marks. The watch has fixed bars.
The case is 95+%, whilst the dial and the movement are both 99%.
The watch measures 37mm Diam, 46mm lug to lug, it is 13mm high and takes an 18 mm strap and a new NATO (G10) strap is fitted.
£4,000.00 (approx. $5,750.00US)