Print a page of numbers (maybe sqrt 10) with up to seven presses of a single page, using the same principle as the seven-segment digital display. One only needs 4 types of sorts (plus blank space), allowing rotating them 180 degrees.
This would be labor intensive and annoying (because the typesetter only sees one segment of a number at a time). I don't know what it would be useful for.
One could also do it with only one sort, a segment that can be laid horizontally or vertically, and spacers of various dimensions. This could be done in 1 pressing, or 3 if the inked part of a type can't go all the way to the edge: horizontals, one diagonal pair of verticals, the other diagonal pair.
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