Here's a fact sheet from the Nat'l Park Service, Springfield Armory Nat'l Historic Site. http://www.google.com/url?sa=t&sourc...g63Og4Fe1gkzfg
(the link is a Word document)
It's in Springfield, MA, location of the original Springfield Armory.
After it closed in 1968, the current Springfield Armory Corp. opened in Geneseo (the "-eo" is correct, IIRC), IL.
The tanker is likely USGI quality but not actually an issued item (tankers never were . . . just experiments by the Army, and then commercial modifications of existing M1's). The stamp you described makes me think it was made in '64 by the SA Corp. (in Geneseo) as opposed to the Army (in Springfield), but then again the Army still ran the original armory in '64, and the current SA Corp. didn't start until the 70's. In short, I'm confused, but hope this info will help.
Not sure of the value, but Gunbroker, etc. ought to give you an idea. I'm quite sure it's worth a lot more than what it was 20 years back.
Please post pictures.
Last edited by Joe Garibaldi; 04-26-2010 at 18:22.