According to SCSW 4th, stamping the serial number on the stock panel was discontinued in the mid-70s. That may be when the decision was made, but I have a 17-4 that left the factory in December of 1979 that has the serial number stamped on the stock panel. And I bought the gun new in April of 1980. So I would expect to see the elimination of the stock serial number shortly thereafter.
Pretty much guessing here, but I assume most 60s (other than the LS) were fitted with rubber handles around 1996 with the introduction of the J Magnum frame and cylinder. I think this would be the 60-9 and later. If I am incorrect, hopefully someone will point it out.
