The two historic electric cogwheel railcars of the Rigibahnen (former Arth-Rigi-Bahn ARB) in the shed at Goldau. On the left BDhe 2/4 # 7 from 1925 (SLM/SIG/MFO), on the right the worldwide oldest operational cogwheel railcar BCFhe 2/3 # 6 from 1911 (SWS/SLM/MFO).