Heh, yeah. A lot of people don't know that the racks the slide were set in were cranked through an oven on a conveyor with a crank. If the fella doing the cranking started to get a little chatty with the fellow on the other line, you ended up with various tones. That's what an oldtimer told me that worked in that era during a discussion in the 80s .1911 Remington UMC frame. Colt 1911A-1 slide. WWII plastic grips. Parkerized finish. 1911 style hammer and trigger. I would value the gun at 1500 to 2000. The 2 tone finish on the slide is normal. The parkerizing shows the heat treated areas.