This subject has been discussed many times over the years. Gil Newton mentioned that in his Bob Murphy book on New Services however recent studies seem to show differently according to the Colt Archive folks. Paul has a post talking about it that may shed some light. You will have to do a search to bring it up. Where is A1A when we need him.I am guessing the N is an inspector stamp. I have silly question is the T something dealing the point of impact at this revolver that was set by Colt? I have heard somewhere that the T mean target, most likely a gun store myth, just wondering if there's any truth in that statement.
Excellent and thanks for posting. According to a recent study Colt built approximately 20 New Service Fitz revolvers. Yours is one of the later ones along with the other two in the shipment. Since they went to Joseph Lorch we can probably assume that they were for one of the Government or Law enforcement agencies.