Dear Jim, may I abuse your patience too?
In 1976 sept. I bought brand new at local seller (Rome, Italy) a model 60 Chief Special with serial number R 1531xx but after 35 rounds it had a lock-cylinder breakage. S&W replaced for free the revolver with a serial number R 1472xx quite functional and flawless through all these years. I would like to know which year is the manufacture of both the guns (I wish mine wasn't prior to 1975). Thank you in advance for your kindness.