This is a pretty big wheel as wheels go -- 12 inches across. It's in pretty good shape, too, and perfectly usable as long as France hasn't changed its language in the last 50 years. The copyright date was 1956 and this is the 1967 edition. I wonder what's different? This wheel has two disks on top of the main background one, but they don't work together. It's just a way to pack in more information without making the wheel 24 inches.
I don't speak French and don't anticipate doing so anytime soon. If I did, I guess I'd feel kind of dorky bringing this to class. But I do like the little professor with his mortarboard hat and pointer and holding his right hand in an attitude that seems to say, "Viola!"