Serial numbers through about C4500. High polish on all parts and fire-blue finish on trigger, slide stop, thumb safety, hammer pins, ejector and stock screws. Pistols in latter part of serial range did not have fire-blued stock screws. Pistols through about serial C350 had the dimpled magazine catch. Main spring housing pin was rounded on both ends in pistols through about serial C2000. Keyhole (punch and sawcut) magazines were shipped on pistols through serial C3500. NOTE: Add 30 percent for three-digit serial number; 60 percent for two-digit serial number; 50- to 100 percent for finish 99-100 percent.