My Colt New Service in .455 calibre-this type was designed by Colt at the turn of the 19th century as a new heavy pistol in a variety of large calibres for military/paramilitary and civil purchase. US military use of .38 cal revolvers in the late 1890s-1900s had shown the need for a more substantial round for certain man stopping and this was Colt's response. It was adopted by British and empire forces as a substitute (along with Smith and Wesson equivalents) for the Webley revolver during WW1. This particular pistol was made in 1915 and although the blueing is worn, it's in very good mechanical condition and has an excellent bore. I had the opportunity to shoot it last year at the WAAAS collectors shoot and it's very accurate, although like most military revolvers with no safety fitted, trigger pull is heavy in double action-you really have to want to make it go bang! And if you run out of ammo, it's quite handy to belt the enemy over the head with as well, being both heavy and solid.