Adler (cars and motorcycle)

The Adler factory produced bicycles (from 1880), typewriters, sewing machines motorcycles, aircraft and calculators in addition to cars.

In the first months of 1931, Ganz constructed a lightweight Volkswagen prototype at Adler with a tubular chassis, a mid-mounted engine, and independent wheel suspension with swing-axles at the rear.

After a shift in management at Adler, further development of the Maikäfer was stopped as the company's new technical director Hans Gustav Röhr concentrated on front-wheel driven cars.

The last new car introduced by Adler was the 2.5 Liter of 1937; it had a six-cylinder engine producing 58 hp (43 kW).

In 1993, Olivetti sold Adlerwerke AG, which is still listed on the stock exchange, with the entire historical factory premises in Frankfurt to real estate investor Roland Ernst and construction company Philipp Holzmann.

The existing typewriter production was initially relocated and finally discontinued in 1998; the site with the listed buildings was sold separately to subsidiaries of the investors.