1951 Bowman printers sheet mark?

[LuckyLarry]

I know that the T206 baseball card collectors love to see print sheet marks on their cards. I saw this 1951 Bowman #144 Bill Dudley card on eBay and found it interesting, so I purchased it for $4.95 delivered. It's the last card in the set, and the Standard Catalog places the NM value at $195. So at 2.5% book it's a nice pick up for me.
A quick internet search reveals that the 1951 Bowman football set was printed on four sheets of 36 cards each. The Bill Dudley card was located on one corner of one of these sheets.
Anyway this card being way off centered top to bottom reveals what appears to be some kind of blue printers mark that might have appeared on a sheet?
What do you guys think?
Larry

[Vintageismygame]

Seems to be pretty common on most Dudley's.

Matt

[LuckyLarry]

Thanks for the reply Matt and I think you are right. After a quick eBay search, cards on the right edge of sheet four (#117 #126 #135 #144) all have that blue line if they are off centered. And it looks like all cards on the right edge of printing sheet three (#81 #90 #99 #108) have a red line if they are off centered. I don't see these lines on printing sheet one (#9 #18 #27 #36) or two (#45 #54 #63 #72).
Larry