Oscar Egg was a Swiss track and road bicycle racer. He captured the world hour record three times before the First World War and won major road races and stages of the Tour de France and Giro d'Italia. He was also a noted developer of racing bicycles and bicycle components including lugs and derailleurs. In the yellow jersey at the 1914 Tour de France after stages 4–5 — 2 stages, July 4 to July 7, taking it from Emile Engel. Wiki link