The complete left slit of the 67 highs is known as are the top 5 rows of the 2nd slit. Counts over time of the ebay listing also support the 1x5, 1x4, and 5x3 layout.
For the 68s, the card counts (ebay listings) of the Tracewski, Stephenson, and F Robby (500) are much higher than the counts for the May, Bryan, Von Hoff, & Robby checklist. So, it may be that a 3x4 & 4x3 arrangement was actually used, but that hasn't yet been fully established.
There are a few miscuts from the Stephenson row that suggest that row may be at the bottom of slit B.
Last edited by Kevvyg1026; 02-22-2021 at 09:41 AM.
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