One of the most typical figures of the old West is perhaps that of the Sheriff, armed with his gun and his star. And that beloved and feared, hated and respected gun, was an authentic milestone in the american history, tied up as it is to the life and to the myth of legendary characters: Buffalo Bill, Billy the Kid, Wild Bill Hickok, the Dalton brothers, Theodore Roosevelt, Captain Jack Crowford. That gun IS the Single Action Army, at once nicknamed “Peacemaker“ for its sure pacifving effect. The project, introduced in i 872, brought forth to face the demand of the american Ordnance Dept. for a new big caliber revolver destined to equip the cavalry, is to a large extent ascribable to a skilled technician named William Mason. Mason had been able to design a revolutionary gun, combining a new ejection device with the best characteristics of the revolvers produced until then : compact frame and screw lodged barrel.The internal mechanism, still valid after 25 years from the introduction of the Walker, did not require any design modification.