Dornier Do Y / Do-15
The Do Y medium bomber had a high-set wing and and three engines, two on the wing leading edge and the third on struts above the wing. The Do Y was built in Switzerland in 1931 and possibly 4 were built. The first 2 models (Werke No 232 and 233) were powered by Bristol Jupiter VI engines with 2 bladed wooden props were ordered and delivered to the Yugoslavian government in October 1932. They were later captured by invading German forces in 1941.