Master Navigational GCT Watch AN-5740 4992B 24 Hour and Carrying Case H-46 according to the Maintenance Interchangeability

according to the Maintenance Interchangeability Cross Reference Chart dated Dec 1943

This item has a serial number prefix of AF-48

F-105 Thunderchief (see photo)

part number 645262

a straight tube such at this one

Master Navigational GCT Watch AN-5740 4992B 24 Hour and Carrying Case H-46 according to the Maintenance InterchangeabilityThis is an authentic WWII era GCT (Greenwich Civil Time) Master Navigational Watch AN 5740 Hamilton Part No 33106, Grade 4992B 22 jewel movement, suspended within an original metal Carrying Case. The watch has a serial number prefix of AF43, evidence of a 1943 manufacturing year. The watch rests suspended on shock springs within the carrying case, and can be viewed through a glass window by rotating the metal door to reveal the watch. The metal case