The cards from the early 50's were cut with a virbating wire ( like a jig saw ). When the wire began to get loose or worn, the cut was/became rough. I can't speak for later years, perhaps Topps was still using the same equipment in the early 70's. From what I have read, a rough cut does not effect the grade of the card since a rough cut is not out of the norm and at times expected for the issued cards.
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