Pershing.īy 1942 those prefix letters were discontinued, just numbers used. Also in 1920 was when Army officers received serial numbers, with the letter “O”, the first being issued to General John J. After WW I in 1920, the Army introduced the first “service number prefix” which was intended to be a letter placed in front of the service number to provide additional information about the veteran. Imagine that was your ancestor and you have just learned that bit of information. The first Army personnel issued the first number was Master Sergeant Arthur Crean. Other military branches (Navy, Marines) were still small enough not needing serial numbers. The first service numbers to be issued in February 1918 were only to Army enlisted personnel. Before that date the main method of identification of soldiers was by the ‘roster rolls’ or ‘muster rolls’, the listing of soldiers during a specific time period. YearĪmericans have been in numerous wars over the decades but it was not until February 12, 1918, that there was the introduction of US Army serial numbers (SNs). not the serial number on the external case. Your movement serial number may not be in exactly the same location as the one in the photo, but you are looking for the serial number that is on the watch mechanism itself. You usually have to take the back off the watch case to see the movement serial number which may appear anywhere on the watch movement. Cases and watches were often made by different companies and each usually has its own serial number. not the serial number from the watch case. the working part with the wheels and gears.
You must use the serial number from the MOVEMENT of the watch.
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