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

I don't know of any prior Wilesco D12 twin, just the familiar single oscillator.
Here's a link to the new one.  https://www.wilesco-shop.de/en/stationary-steam-engines//steam-engine-d12.html

Smart looking "NEW" offering from Wilesco , I'm glad their R&D dept. Is on the ball offering g new machines for us to try out. The oiler built into the pedestal between the two cylinders is a brilliant touch ,I wish they would have gone with a better steam throttle valve though.