Hello. Your set appears to match the checklist for the 1966 Sports Service Cleveland Indians team set. The Trading Card Database website actually has this set checklisted along with other team sets produced by the same company. The sets ran from early to late 1960s or so, with the Cleveland sets running from 1963-66 or so. In some years it appears there were more than one possible combination of player photos packaged together for that year, hence "A" and "B" sets.
https://www.tcdb.com/Checklist.cfm/s...ndex=1#8328520