The powerful Eb 3/5 # 9 steam locomotive was built in 1910 by Maschinenfabrik J.A. Maffei in Munich for the Bodensee-Toggenburg Railway, as part of a series of nine locomotives. It is also known as the “BT-Habersack,” in reference to the SBB's Eb 3/5 “Habersack.” After the electrification of the Bodensee-Toggenburg Railway (BT), the locomotive was used by the SBB throughout Switzerland from 1932 to 1965. There it bore the operating number # 5889. In 1965, the locomotive was about to be scrapped. Thanks to a group of enthusiastic railway fans led by the then BT director Walter Kesselring and workshop manager Koni Weibel, himself a former steam locomotive driver, the Eb 3/5 BT # 9 was saved for posterity in a rescue operation. The locomotive was purchased with private funds and has been kept in working order ever since. It belongs to the Dampfloki Club Herisau (DLC), which was founded in 1965. Since 2012, it has found a new home in Bauma at the DVZO and is part of the DVZO locomotive park.