Not a steam engine, but a vacumm engine. This rather big engine was made by Plank and first appeared ca 1914, It was also listed in 1927 with a different model number, 682. The vacuum engines are also known as flame-lickers, as they swallows the fire which is then cooled down in the cylinder, thus producing a vacuum. Sadly I have not yet managed to get it running.

Here it is disassembled for a cleanup.