Eidgenoessische Konstruktionswerkstaette
 EKW (Eidgenoessische Konstruktionswerkstaette English: Swiss Federal Constructions Worksalso known as Eigenössische Flugzeug Werke - EFW or as Flug + Werk).The Federal construction workshops (ekw) was a composite of Swiss state-owned enterprises with the aim to make the Swiss defense of imported arms independently. It was established 1867 in Thun.Already around 1915 Switzerland put in an effort to make themselves independent of the import of military aircraft.