Colt New Service Model 1917 Civilian/Commercial (Parts Model)
.38-40 WCF, .44-40 WCF, or .45 LC cal., 4 1/2 or 5 1/2 in. barrel, hard rubber grips, or checkered walnut with medallions, last patent date is July 4, 1905, approx. 1,000 mfg. serialized 336,450- 337,500.