Hello,
Currently on ebay there is a photo of Pomilio PC 3757 at:
https://www.ebay.com/itm/Italian-Ita...0AAOSwND5es2CU
However, the http would appear to indicate that the aircraft is a PE Fiat-300HP. But looking at images of 3757 elsewhere on the net, it was photographed as part of the Italian aviation mission to the USA, it appears identical to the 3780 in post 1 in this thread.
Regards,
Clint