The Amka brand was established by the Hague violin maker Albert Veneman, on the insistence of his son Koob, and was used on acoustic, Hawaiian and archtop jazz guitars  produced from 1938-1943. In their Princestraat workshop in The Hague they made around 7000 instruments. Koob Veneman emigrated after the war to the USA and established the Kapa guitars brand.

Source: History of Netherlands Guitar Manufacturing