Colt Single Action Army
.45 Colt or .44-40 Winchester Center fire (WCF) or 38-40 (38 WCF) or 32-20 Winchester (32 WCF) or 41 Colt, and up to 25 other calibres!
These are the "PeaceMaker" variants with the 4 and 4.5 inch barrels sometimes referred to as the "Gunfighter" models.
Developed in the early 1870s the range of Colt Single Action Army revolvers with a wide rnge of calibres and barrel lengths were produced up until the start of the 2nd World War.
Production was resumed in 1956 by popular demand caused by TV and film Westerns.
It was named "The Gun that Won the West" and was associated with famous lawmen such as Wyatt Earp and outlaws like Frank and Jesse James, and Butch Cassidy.