Flugmotorenwerke Ostmark
The Flugmotorenwerke Ostmark GmbH (German for Aircraft Engine Factory Eastern March) was a large German aircraft engine supplier during World War II. It operated as part of the Steyr-Daimler-Puch conglomerate and specialized in the manufacture of aircraft engines for Heinkel. Three large factories were established, all in or around Vienna: in Wiener Neudorf, in Biedermannsdorf, and in Guntramsdorf.