antique school stamping sets in wood boxes, rubber stamps w/ large letters & numbers

Early 1900s vintage rubber stamps from an old country school in Wisconsin. There's three sets in this lot, all alphabets complete, though a few of the numbers are missing. Great old fonts here, and I love the additional symbols!

The wood cases are very worn (and one case is broken), though the stamps themselves look good, not brittle, not noticeably worn.

These are marked for Stone School, Watertown - if you're interested. I can't find out anything about this school on the internet, and these actually came to us out of a farm estate not far from Watertown. But that's all I know about their history.