I'm not up to speed on the plate scratches. I've seen the Obak and AC setups. I don't think they are the same printer, but I don't think that printer is known. I may be a little behind more recent discoveries though.
If we come up with a sheet about this wide, it would gives us 3 panels in a row, making it unlikely these are all from one sheet.
Before this find, my suspicion was multiple size sheets were used, and layouts were different for small format and large format cards. Large format cards seem to repeat top to bottom, and also horizontally. Small format cards don't seem to have been printed in blocks, but with a card repeating only vertically.
It's interesting we have only one corner piece and no left panels. I suspect either the sheet is huge, some of the interior-looking panels are trimmed to cut the white border, and/or The E229's fit into the same, large sheet.
I hope what we may learn from this is helpful to other sets in the ATC/AL partnership. I have some uncut T25 strips as well showing different cards adjacent to each other in a large format, different from T220-1 and T218-3.
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