question about OPC edges/ rough cut et. al.

What year did quality control improve on the OPC issue?
(When did they stop using dental floss to cut the cards and start using Beavers)
Just curious! thanks!
Leo
(When did they stop using dental floss to cut the cards and start using Beavers)

Just curious! thanks!
Leo
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Lee
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Collecting 1970s Topps baseball wax, rack and cello packs, as well as PCGS graded Half Cents, Large Cents, Two Cent pieces and Three Cent Silver pieces.
Correct me if I'm wrong.
Factory sets started in 88.
Or Regional Canadian Baseball Issues?
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there was a 76 opc baseball vending case in mastro a few auctions ago, have yet to see a box from the case on the market anywhere. there was a seller that claimed to have a couple of 73 opc baseball vending boxes on ebay a year or so ago, outside of that , never seen or heard of opc vending baseball boxes