It was changed to GMT or Greenwich Mean Time in 1952. The AN designation is for Army-Navy.Manufacture date is 1942 for the WW2 period. The watch is running and keeping excellent time, not tested long term in all positions. The case has nicks to the edges. The plastic lens has come loose. I did not want to replace it as it is the original, I left it loose so the new owner can decide if they want to replace it. The back engraving is clear and sharp.. Please examine the photos for condition details.
The serial number matches the one engraved on the case AF43-23026 which is the Air Corp serial number not the Hamilton one. Not too many out there with the original box. The item "Hamilton GCT 22j WWII 4992B Military AN-5740 Army Pocket Watch Original box!WW2" is in sale since Sunday, December 03, 2017. This item is in the category "Jewelry & Watches\Watches, Parts & Accessories\Pocket Watches\Antique".
The seller is "theclockbrothers" and is located in Berne, New York. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Russian federation, Israel, Mexico, New Zealand, Singapore, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion.