Manufactured in 1970, as part of the transition between the original Government Model and the Series 70 run, with a "BB" stamped on top of the barrel and on the right side of the frame below the serial number to denote installation of a Series 70-style "four finger" bushing. Blade front and square notch rear sights, with the model marking and Rampant Colt on the left side of the slide, "3/VP" and "K" on the trigger guard, and a pair of checkered grips.