If it reads Mod 36 it is not a Model 10, it is a early J frame , Model 36, Chiefs Special. Should have 5 holes in the cylinder, Your serial number dates it to 1963-1969, I would guess 1964 or 1965. The number on the cylinder support is a assembly number and means nothing outside the factory. If you go to the S&W site, I believe you can get a manual, or Google Steves Pages and download one.