Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Unfortunately no manufacturer known Tommy.
Only piece of paper i´ve seen mentioning these, is an instruction manual for the horisontal.
It has the name "E. Bühler, Stuttgart" at the bottom, but that is believed to be a retailer as far as i am informed.

...and yes, if you´re thinking about the one listed with a few accessories as well, it is the one from last month.