Complex sentence: Those Re.2007 drawings were based on a speculative reconstruction derived from a Reggiane engineers description: it was notable the futuristic (for 1943) swept wing, which was later introduced on fighter planes only in the 1950s.
Split into simpler sentences: Those Re.2007 drawings were based on a speculative reconstruction derived from a Reggiane engineer's description. The drawings were notable for the futuristic (for 1943) swept wing, which was later introduced on fighter planes only in the 1950s.