I was informed by more erudite collectors than I that a T denotes the gun was target regulated at the factory. Either by the customer's request, or in the case of certain target models, as standard procedure.
I am going to have to check my only pre war DS today, Rich. I'll get back to you.For what it's worth, I have quite a few pre-war Detective Specials. All of them have the "T" stamp. In fact, I don't think I have ever seen a pre-war DS without the stamp. I have also read and heard the assertion that the marking means that the gun was "targeted" but I have never seen any evidence to support it.
If anyone has a pre-war DS without the "T" stamp, please let us know.
Mike, I thought about your gun after I posted my reply. The square butt military guns are a breed of their own. I have always thought they were produced on Police Positive Special frames since, at that time, the PPS still retained the square butt frame. That could explain the different markings. Also, assuming these are simply inspection marks and not a reference to "targeting", Colt may have used a particular inspector or inspectors because of the military contract and/or destination.My 1944 Army Intel. Detective Special (1941 serial number frame) has an M and and L stamped into the crane recess in the frame. No T.
I am beginning to think a T is just another assembler or inspector marking and has no proven basis as denoted as target regulation.I wonder about the meaning of the "T." I checked every Colt revolver I have of all frame sizes, and the only one with a "T" is a Mid-1930s Official Police that letters as having an "adjusted pull." (I doubt that there is a connection there, but I mention it for what it is worth.) Even my targets model revolvers (Officers Models, Police Positive Targets, Shooting Masters, New Service Targets, etc.) do not have the "T," and one would think that if any would, the target models would.
All of this is migh-T-y puzzling!