My reference says 1960s as well, noting that it isimpossible to say what year it was issued. Callison played with the Phillies from 1960-1969 so to determine an exact year is nearly impossible. In my own collection tracking, I simply list these types as the first year possible, i.e. 1960.
Bruno
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Check my Profile page to see my 2023 Goals and my Lists of sets near completion (5 cards or less) or sets getting close (less than 100 cards missing and 75% complete).
https://www.tcdb.com/Forum.cfm/Page/B/ID/0/?MODE=VIEW&ThreadID=25745&C=0