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Is it always a diagnostic that the large holes have partial cuts on the edge and the small holes do not?
I don't recall the source, but if you compare pairs of the 1054A, the perforations are not as well centered in the "large hole" variety but are typically better centered between the stamps in the "small hole" variety. The side-by-side comparison by JLLebbert posted earlier in this thread seems to bear that out.
Also, there are 12 complete holes in the 'small hole' versus 11 complete holes in the 'large hole' variety. There must be an easier way to figure this all out.