What caliber and year type pistol did Clint eastwood use in the good bad ugly?

Clint Eastwood's character, "The Man with No Name," used a Smith & Wesson Model 3 Schofield revolver in the film "The Good, the Bad and the Ugly" (1966).

The Schofield is a .45 caliber revolver that was standard issue for the U.S. Army during the American Civil War and remained in service until the late 1880s.