bisley,model 12 & makarov

have friend (older gentleman)who needs market prices on 1912 colt bisley 45 cal.flat-top w/7.5 barrel(blue finish),target grips(also has stag grips circa 1948)
he also has mdl#12 winchester pump w/28" barrel,year mdl.1948-50' has original sales reciept and handbook.i also need info on a makarov IJ-70A )9x18 ammo,gun markings are,APE 3179,K.B.I, ING.HBG.PA,made in russia by Imez,there are 3 circular markings on right rear corner(none of which is a "10")bottom part of gun is a flat or satin finish,and the slide is polished.the word Baikal is on bottom of the grips.it is my first gun and i am curious of its origins and classification.