Young fireman T.H. on the most powerful 1 meter gauge cogwheel steamlocomotive in Europe, the 0-8-0 HG 4/4 # 704 of the Dampfbahn Furka Bergstrecke (DFB), which was built in 1923 by SLM Winterthur for the Chemins de Fer de l'Indochine (Indochina, later Vietnam) and never run in Switzerland before. The locomotive is pulling a test and instruction/training train from Realp to Gletsch and is in the 11.0 % grade of the Abt rack system between Tiefenbach and Furka DFB, the throttle is shot right now (lever to the right). The boiler steam pressure is at the maximum of 14 bar or 203 Psi (indicator up in the middle). The hand of the fireman is on the handle of the fire door. The wheel on the right is the reversing lever. The engineer is leaning out of the cab on the right and is not visible.
