Welcome to the Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines - Enjoy!
Looks a lot like a bing i have, but then all those big german engines look alike to me.Sorry i cant helpCrazydoug
I'll throw my hat in the ring... Marklin 4149/9. Missing sight glass but otherwise looks unmolested. Nice.
Agree with Scott. To confirm provide a few measurement. Size of base. Diameter of Flywheel. Diameter and length of boiler. If he decides to sell it, ask him to offer it on the Forum! 🤠