Elite Diamant Siegmar/Sachsen bicycle from 50s. The famous German Diamant company based in Chemnitz (see also: Sachs-Diamant) was transformed into Elite-Diamant AG in 1920, when they joined Elite-Werke car company. In 1928 the company was bought by Opel, but in 1930 it got back part of its independence and since this time the company's name was Elite Diamant AG Siegmar/Sachsen.
Above: Diamant Werke in Chemnitz
Diamant family. Advertising photo from Diamant catalog 1913. Diamant had started serial bicycle production as early as 1895 and in interwar years it was a leading bicycle manufacturer in Germany