actually closer to 1968. standard (not heavy) 3" barrel is legit, aftermarket grips and hammer/trigger/release have been worked over - id want to see the other side for plate gap/fit to see if its been refinished..
The number of digits in the serial number makes a difference. The serial number range for 1955 is 55050-75000, 5 digits. The serial number range for 742xxx is six digits and falls between 275000-786544, 1962-1969.
Serial number 5062xx, six digits, about 1967 - presentation engraving on backstrap dated 24 Dec. 1967