serial no. 200913 is recorded in the Springfield Research Service database as "WW2 donation to US Navy" in a reference dated 03/31/43. I bought the Vol.2 book that they issued in 1986 and it is in there. There are numerous other numbers listed under this reference and they run the whole gamut of the serial range. As for whatever the precise info is, you would have to pay them the $50 or whatever it is now to find out