When they were built in 1931/32 (SLM/SAAS) the 1600 Horsepower Bo'Bo' Be 4/4 of the Bodensee-Toggenburg-Bahn were rather progressive. After about 60 years of service they retired, but some are still operational, like number 15 for the Steamtrain Association Zürcher Oberland (DVZO). The caboose behind the locomotive is ex Bodensee-Toggenburg too.