My Model 1903 Colt New Army Revolver bears his inspector initials of 'JTT' at the top of the frame, just above and behind the cylinder on the left side. Thompson was the Inspector of Pistols for the United States Army. Remington Model 1917 Serial Numbersįrom 1901-1903, Captain John T. If your M1903 Receiver is an RIA with a serial number higher than 319,921. Remington, and Winchester had been producing the Pattern 14 Enfield for. Rifle, caliber.30 M1917 (often called the Enfield or P-17) is one of the most. This action was taken from the British Enfield P-14 or Pattern 14 rifle. As I was taking it apart I found the serial number and manufacturer under. I have a US Model of 1917 Winchester, in a mauser action, with a 237,XXX. Thompson, namesake of the Thompson Submachine Gun. What do Thompsons have to do with turn of the century revolvers and M1917 Rifles, you might ask? Well, they are all tied together through history by John T. Why the revolver? Some of you may know that I'm into Thompsons. All, Thank you for this fun thread! Here is a picture of my Eddystone M1917 Rifles, along with my Model 1903 Colt New Army Revolver.