Andrew Glassner's Notebook: Recreational Computer Graphics is a really neat book (I especially like the tiles that can add numbers). The author's site is https://glassner.com/computer-graphics/

Chapter 6 in the book ( https://archive.org/details/andrewglassnersn0000glas/page/98... ) Signs of Significance starts with 7 segment displays to the 14 segment and 5x7...

He then goes on to the 66 segment Vienna underground font and an 83 segment font he saw in an elevator at a Siggraph conference in Orlando ... and then concludes with his own 55 element mosaic.

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Also, Adam Savage's Tested - https://youtu.be/eKCcqlJnZcA (3 days ago) looking at https://www.kellianderson.com/books/alphabetinmotion.html

At 7:00 into the video is C & D pages looking at the modularity of a font.

(the section "U & V" about 3/4 down the page has the modular components for Kombinations-Schrift https://www.moma.org/collection/works/2724 which was also looked at at 22:00 into the video.