Arado-Flugzeugwerke GmbH is marked as the aircraft holder in small print above the aircraft weights. Photo from: Finnish Heritage Agency

First flown in 1937, the Be-51 was the enclosed-cockpit version of the Walter Minor-powered Beneš-Mráz Be-50 Beta. This aircraft visited Finland for the opening of Malmi and the SILI aviation exhibition. A photo taken at SILI reveals the hitherto unknown c/n 23, painted on the nose. Photo from: Finnish Aviation Museum

Built in 1937, a single Anson Mk.I, RAF serial K8741, was delivered to Estonia and is seen here during the inauguration of Helsinki's land airport. Note triangle national insignia on the wing. Captured by Soviet forces in 1940, it continued in service with a Soviet unit in Estonia. Photo from: Finnish Aviation Museum

Lt. Alexandru 'Alex' Papană of Romania was the world acrobatic champion. He flew his spectacular aerial acrobatics in this plane as part of the 1938 Pacific International Air Races, which were held at Oakland Airport 28-30 May 1938. The aircraft was transported to the USA on board the "Hindenburg" in August 1936.