Etrich Flugzeugwerke (EFW) was a short-lived aircraft manufacturer founded by Igo Etrich. [1]
The company became part of Brandenburgische Flugzeugwerke in 1914, [1] which then, in turn, became part of Hansa-Brandenburg.
Some of the planes were manufactured in Trautenau (today Trutnov, Czech Republic) and others in Liebau (today Lubawka, Poland). [2]