VIN tags on early '60s MOPARS are stainless steel spot welded to a stamped steel body panel - these often do not survive 50 years and/or a restoration or two still firmly attached to the car

the fact that the manner they were originally secured was not intended to last 50+ years nor its current attempt at attachment is not the biggest problem with that VIN tag

original 1963 Lynch Rd. Detroit, MI VIN tags had the last 8-digits of the VIN (YEAR - Plant Code - Serial #) on the tag pre-stamped with "raised" numbers - the first 2-digits of the VIN were stamped after the car's "LINE" & "MODEL" were determined, these first 2-digits are stamped from the top-down (not "raised")