S&W would have kept the daily production data for the Model 58 in their log books beginning in the summer of 1964. The factory designation for this model is N-410. The first Model 58 shipped on August 6, 1964 has serial number S256119. S-prefix Model 58s could have shipped through 1970 and serial number S333454, the last serial number with an S-prefix. However, as stated above, this serial number range is shared by all N-frame models so it is impossible to know how many in this range are Model 58s.

Bill