Those are the biggest portions of '52 sheets I have ever seen John; nothing but 5 x 5 quadrants until now. I thought that the big sheet was two partial halves of a full 200 card sheet, as the gutter down the middle makes that pretty clear to me then I see the horizontal gutter. Either those were from a proofing operation or Topps had Lord Baltimore Printing running off 400 cards on a big sheet, which I am trying to get my head around. Is a sheet that size even possible to print in 1952?
Is that a full run of 81-130? I presume it is. Where one earth did you find that scan?!
I have some bits and pieces on my blog as well:
http://toppsarchives.blogspot.com/se...pps%20Baseball