Derby was a small car produced in Hradec Králové by Vojmír Věchet, who ran an auto workshop there. Věchet had earlier been known for the cars he built before the First World War under the name V. Věchet a spol. in Nymburk, and he also worked as a racing driver. After 1924 he built a prototype of a people's car named VAD. In 1928 Věchet built the Derby as a…