COLT NEW SERVICE - The Colt New Service went into production in 1898 and was produced until 1941 in one form or another, seeing an estimated 356,000 hit the market. It saw action in both World Wars as both the .45 Long Colt caliber M1909 and later as the upgraded .45ACP-chambered M1917. With that being said, you can find these revolvers chambered in a variety of calibers but the one featured here from the Vault is .45 LC. Add it to your collection today by clicking the button below.