Manufactured in 1958 with standard markings and features and consecutive serial and assembly numbers. They come in a Colt Custom Gun Shop case. Only 36 consecutive Second Generation sets were ordered in .45 caliber with 7 1/2 inch barrels and nickel plated finish per Don Wilkerson on page 87 of "The Post-War Colt Single-Action Revolver, 1955-1975."

As "A."