Manufactured by Altona Motors of Borgerhout, Antwerp, 1938-1946.
The company was established by De Belder, formerly of Minerva, shortly before the war. The firm built commercial delivery three-wheelers under licence from Borgward which were sold under the Goliath name, and in 1946 built a passenger model named the Condor, which did not enter production.
The name Altona is derived from the location of the Borgward plant in Germany, near Hamburg.
Sources: vvcc.be; de.wikipedia.org.