Pre-war Ace Model .22 blue, serial number 9104 circa. 1938, in 99% original
finish, late front sight. The left side slide marking has two lines, one is the address, the other just under, are the patents (1913), the rampant is not just after these two lines, but behind the serrations close (of the hammer), the right side is: Colt ACE .22 Long Rifle.
Photo courtesy of Michel Pochat