I've had one or two marble "mazes" of this sort over the years, but this is the oldest and the most primitively handmade I've seen, as so of course I think the most beautiful. Turning it over reveals the wood base to be quite a ways from perfectly round, and so the maze, constructed of tin strips set into radially carved niches, is oblong too. I'm sure I've got a few old marbles lying around that I'll send along with it so to be able to play it straight away, though it'd be quite a nice thing to hang on the wall, too.
9 3/8" w x 8 7/8" the other way (not quite round!) x 1 5/16" t. Late 19th/early 20th century I would guess, overall good structural condition, with a rich patina to the dry wood especially on the underside. A little rust visible on the tin and just a little separation between the tin and the wooden base around the far perimeter edge as pictured.