....I see now where the poster clearly sez they are "non cokes" .
Would it be safe to say that before and after the era of "cokes" that the the checkered Target grips were available ?
So it might be possible to have Target grips that were made from either say 1951 to 1955 OR from 1964 to 1968 and not be able to tell which decade they were made in ?

Can the black washer changing to silver color help ??