I'm not completely sure what this would have been made for, but I'm sure keeping score, and I think maybe billiards, as I've seen a few other with the same progressions from 1-10 and 10-100. I just think it's a terrific object, and could be used to track all sorts of things, including perhaps inspiring some games of one's own invention. I tighten the screws on the arms a bit and they are nice and tight, easy to turn but holding tight wherever you point them. Great just to prop somewhere but easy to add a hanging hook to the back.
12" l x 5" wide x 7/8" thick, great vintage condition with a nice patina, and really quite a satisfying thing.