"Mod 66-2"............. is a Model 66 ...... -2 is the third variation ... which eliminated the recessed chambers and pinned barrel.


Nice gun; it's the stainless steel version of the Model 19 introduced as the Combat Magnum in 1955....... the Model 66 was added in; IIRC 1970. The -2 about 5-6 years later.............................. barrel lengths were; 2 1/2, 4 and 6 inch