Derby

Derby was a maker of ebauches in La Chaux-de-Fonds, part of Ebauches SA.

Wuilleumier Frères

Wuilleumier Frères was perhaps the most important watchmaker to arise in Renan. Started in 1859, Wuilleumier specialized in timers and measuring devices.

Awards for Wuilleumier Frères include Antwerp 1885, Liverpool 1886, Paris 1889, Chicago 1893, and Geneva 1890.

An unrelated case-making firm called Wuilleumier Frères existed in Tramelan-Dessus.

Pedos

The company changed its name to Pedos SA in 1929 to reflect its most popular product at the time. Administrators at this point were Louis Schorer of Wangen s. Aar and Fernand Hippenmeyer of Gottlieben. The company was headquartered at the J-Armand Wuilleumier factory in Renan. René Ruchti of Büren joined Pedos management in 1931.

The sales offices for Pedos relocated to La Chaux-de-Fonds in 1932 along with Ollendorf Watch Co, with both sharing the same office at Rue du Parc 105. But manufacturing remained in Renan. The company found modest success with pedometers and golf timers in the 1920s. In the 1930s, Pedos specialized in measuring and timing devices, including the calculigraphe, a 26 ligne calculation watch which replaces the slide rule, along with the cartometer, curvimeter, and pedometer. Pedos also offered a complete range of counters and chronographs, including a 12 ligne chronograph.

Pedos gained infamy as a target for Fidhor in 1934 and was convicted for violating export and price controls.

Derby

Pedos gave way to Derby in 1939, relocating the headquarters to La Chaux-de-Fonds in 1941. The sole administrator of the company was Louis Schorer, with Fernand and Edgar Hippenmeyer, Ernest Schorer, and René Ruchti removed. Derby SA was reorganized again in 1946, with Louis Schorer remaining as president and Henri Jeannot of Brenets, Virgile Juillerat of Granges, and Charles Gschwend of Bienne added.

Derby later found success as a specialist in electric and electronic movements as part of ETA.