The first Tulikivi rolled off of Ilmailvoimein Lentokonetehdas (Air Force Aircraft Factory) lines in 1930 as a twin engine light bomber. Since that time many improvements to its design have been made. By 1933 the original engines were uprated along with an additional pair of engines added at the rear of the nacelles and improved defensive armament was added - allowing the former light bomber to carry a medium bomber's payload. It was in this form that the IVLK-6c saw service against the air service of the United Kingdom of Sweden & Norway in 1935-1937. In 1938 the IVLK-6d was introduced featuring retracting primary landing gear and improved control surfaces making it extremely agile for a bomber. The following year the difinitive variant, the IVLK-6e with powerful new engines, including the Karlstad Mekaniska Werkstads KMW-12Z 2,000 HP driving contra-rotating propellers at the rear of the nacelles was introduced. All variants saw service against the Polish-Lithuanian Commonwealth in 1938-1939. CG 1-3 drops volleys of 250 Lb. Bombs. After the war they remained in service until the mid 1940s when they were gradually relegated to training, ground instructional machines and and transports. Prince Juho reinstated the remaining 122 aircraft to active service in their intended role. (Credit due to its original creator @TheOwlAce touch ups, armament, insignia and paint scheme added.