Lovely Old School Slate with Angled and Gridded Guides playing card dominoes it looks 1940s or so

it looks 1940s or so to me

I'd love it filled with a a couple of tall flowering branches or a few huge Asiatic lilies

with the (albeit a bit tattered) instruction booklet

4 1/4" long x 3 5/8" tall

with Mexico painted on its side

Lovely Old School Slate with Angled and Gridded Guides playing card dominoes it looks 1940s or soI've bought and sold a lot of old school slates, usually attracted by the often mended (and best of all carved into) frames on very antique ones. In this case, though, it is the slate itself that sold me, one side etched with a grid, as one sometimes sees, but more unusually the other with angled guide lines of varying widths, designed for practicing cursive writing at just the right slant I believe, both in capitals and lower case. And that side