"Mogul" steamlocomotive G 3/4 # 11 "Heidi" of the RhB, rebuilt by association "Club 1889" in Samedan, on a test run with a short freight on a grade of 4.5 % between Laret and Davos Wolfgang (Wolfgang pass). The locomotive, built in 1902 by SLM Winterthur, is converted to burn light oil now and got a superheater. There is absolutely no visible smoke, although the engine is working hard.
