Häfeli DH-3
The Häfeli DH-3 was a 1910 Swiss two-seat reconnaissance aircraft , built by the aircraft department of the Federal Construction Works ( "Eidgenoessische Konstruktionswerkstaette" , ( K+W ) ) at Thun , Switzerland . 
<triplet> Häfeli DH-3 <subj> Eidgenoessische Konstruktionswerkstaette <obj> manufacturer