Master Navigational GCT Watch AN-5740 4992B 24 Hour in Original Box 1942

This is an authentic WWII-era GCT (Greenwich Civil Time) Master Navigational Watch AN-5740 Hamilton Part No 4992B 22 jewel movement, The watch has a serial number prefix of AF42, evidence of a 1942 manufacturing order.

The watch winds and runs for ~48 hours, which is its minimum specification.  Has not been recently serviced.  

This watch is in its original factory box and sleeve.