F Giulli Macchi C 207
Proposed in 1944, the Macchi C.207 was equipped with a 1,750 hp DB 603 engined. The main change was an increase in armament. It was armed with four 20mm cannon mounted in the wings. Work began on the prototype, but it was never completed. After the War, Castoldi proposed a version equipped with a Packard Merlin engine. Italian authorities preferred to invest in a similar version of the Fiat G.55 and the Fiat G.59 was born.