The Piaggio P.23R, also known as the Piaggio P.123 for propaganda purposes, was an Italian commercial transport aircraft prototype designed and built by Piaggio at Sestri Ponente. Piaggio designed the P.23R specifically to break speed records for commercial transport aircraft. It first flew in 1936, whereas development was halted in 1939.
A very sleek design as were many Italian aircraft. Unfortunately passenger capacity was more important than speed at the time. The approach of WWI didn't help and was probably another reason for its demise.