Amanda106 and firebug085: At the top of every subsection under Smith and Wesson Revolvers on the home page is a section is a sticky entitled "To IDENTIFY Your Gun." This will explain the information we need to help you with your questions. Pictures are always of great value in the process. Also, you should start your own thread in the appropriate subforum with a title like Help with Grandpa's old Revolver, or "Mfg date of Model 60"

Oh, welcome to the forum. It's a great place with very knowledgable participants.

firebug085, The serial number range that contains your model 60 is 1974 to 1977: R100000 to R190000. I can extrapolate to guess that yours was late 1974 to early 1975, but that's a WAG. Others may have better information.