The Kl.107 low-wing, wooden-framed monoplane trainer was designed in Germany during World War II. Early versions were powered by the Hirth HM 500 100hp engine, and only a small number were completed before the factory was erased by Allied bombing. In 1956 it was decided to reintroduce the Kl-107 as a civil training/touring type, initially as the Kl-107B, but then as the three-seat Kl-107C. Rights to the design were acquired by what became the MBB consortium, and the final version became the Bo.207.