While I really like the M&P snub.... I Currently only have three.
This 5 screw with "High Speed" hammer is in the C300,000 range (as I recall).
Also have a Model 12-3 from 1972 but since its post 1961 probably doesnt qualify as a "classic".
Also have this nickel 4 screw in the C432000 range from about 1959/1960 ?