A closer look at Ge 4/4 II RhB number 617 resting idle at Chur. These units went into service in 1973 and were built by SLM (Schweizerische Lokomotiv und Maschinenfabrik). The locomotive has a Bo-Bo wheel arrangement with 4 traction motors. Normal catenary voltage is 11,000 Volts Alternating Current at 16.7 Hertz.