Agree, a nickel model 36 looks similar but would have a case-hardened hammer and trigger. Can't make out the SN but it would date from 1965 to about 1981.
But in this case I also agree that it looks like a model 60 based on the tint and softness of the finish.
Model 10-5. What is the piece attached to grip & frame? I never saw one until this thread and on my 10-5. Is it factory or after market?