SIG, short for Schweizerische Industriegesellschaft, was a Swiss machinery manufacturer based in Neuhausen that made two attempts to gain a foothold in the automobile business. After the First World War, aiming to get a light, economical car to market quickly, it acquired the manufacturing rights to the MF-Cycle-Car, a tandem two-seat cyclecar designed by the Zurich engineer Martin Fischer. The 400kg, 3.4-metre-long car had an aluminium-clad wooden-framed body, a 1.14-metre…