Anyone have expertise in '73 Topps FB?
 

I have a question regarding card #133 in the Topps football set from '73. This is the NFC Semi-Final card featuring Staubach in the Dallas vs San Fran game. I have multiple copies of this card, and as I went to pull one to put in my set, I see some differences, and an oddity. There are variations in the front coloring with the banner being purple/yellow to violet/yellow. No problem there, typical printing stuff I assume. But, on two of the ones I have, the bottom edge is not straight. Rather than sitting flat if stood on that edge, it rockers, with the middle being wider than the rest of the card. My others don't have that cut. But, in addition, the ones that have that odd cut also have a darker cardboard back, whereas the straight cut ones are lighter. Does the card being #133 have something to do with the cut? Are cards printed in sheets of 132 which would put that card at a corner?

Just seeing if anyone had any thoughts on this. Thanks for any input.

I found this on-line, if it helps...

Attachment 306143

Well, that answers one question. Thank you very much for looking and posting that, I appreciate your efforts. And that is the edge, on the right side of the sheet, that is uneven. I wonder what caused that, and how common it is. Thanks again.