I have a Colt 1911A1 I'm trying to get some history on. On the left side of the slide it has patent dates from APR.20.1897 to AUG.19.1913, a "prancing pony" and Colt S PT. F.A. MFG. CO. and below that HARTFORD,CT. U.S.A . On the right of the slide it says :UNITED STATES PROPERTY, below that : No1110926, then , further right : M1911A1 U.S.ARMY. There's a P below the mag release and some "weird" symbol barely discernable near the upper left corner of the right side grip cover. Any info appreciated.