Looking for information on Old colt 22 auto. Grip and slide have Sn 13xx. Only thing written on gun is Colt 22 and patent on slide nothing on barrel. Not mine it belongs to a neighbor. Slide Sn is stamped under the bottom of the slide. Thanks Bob
About 31,000 mfg from 1915-1922 of this Colt automatic target model, also called the pre-wodsman light weight pencil barrel. This was MFG in 1916 and should have the checkered rear mainspring housing denoting 22lr STANDARD velocity ammo, not hi velocity. Also should have the thin pencil barrel with a pronounced shoulder that steps down from .600" to .475" at the muzzle.
All pre WWII woodsman (SERIES I) manufactured 1915-1944 were 150,000. Wish it were serial MT 13xx, a match target bullseye.