I really like the looks of those open-geared ratchets. They are VERY handsome tools! I imagine they're hell to keep clean in greasy, dirty working conditions though.
I doubt there's anything special about 'em... but I have most of a set of Thorsen 1/2" Deep well sockets in their metal case. They're all Thorsen, but I think it might still be a mis-matched set. The 7/8ths socket stamp is upside-down compared to the rest. While the 1/2, and 5/8ths sockets have entirely different stamping styles on them.
Anyway, if anything catches your eye, lemme know, wouldn't mind terribly parting with them.