Dear Hesham.
Only one plane construct.
The P23R in the first form has three Isotta Fraschini XI r 850 hp
liquid cool engines. Open cockpits
After tests they were change for Piaggio P XI RC 40 radials engines
1000 hp
2 blades airscrews were changes for three blades airscrew
Open cockpits were enclosed by 2 side by side separate ones
On december 30 1938 2 pilots and 2 flying engineers establish
international records for speed with load 5000 kgs at 404 km/h
The record breaking plane was referred "P123"
See on an old "AIR ENTHUSIAT"
Bye