Master Navigational GCT Watch AN-5740 4992B 24 Hour and Carrying Case (for repair) S2 Tracker and is 4 lbs

and is 4 lbs

but could possibly be repaired

It was also placed in passenger aircraft of the BOAC

so it may have been intended for a two seat trainer

Master Navigational GCT Watch AN-5740 4992B 24 Hour and Carrying Case (for repair) S2 Tracker and is 4 lbsThis is an authentic 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 AF58, evidence of a 1958 manufacturing order. 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 was also