The Colt Diamondback is a revolver manufactured by Colt's Manufacturing Company of Hartford, Connecticut, in calibers of .22 LR, .22 WMR and .38 Special.
Inspired by the successful Colt Python, the Diamondback was manufactured from 1966 to 1988 and was available in barrel lengths of 2½, 4, and 6 inches.
Read more about Colt Diamondback: Description, Diamondback Serial Numbers, Cultural References