Italian <a href="https://en.wikipedia.org/wiki/Piaggio_P.23R" class="extiw" title="en:Piaggio P.23R">Piaggio P.23R</a> commercial <a href="https://en.wikipedia.org/wiki/Transport_aircraft" class="extiw" title="en:Transport aircraft">Transport aircraft</a> aircraft <a href="https://en.wikipedia.org/wiki/prototype" class="extiw" title="en:prototype">prototype</a>
Uncredited
www.aviastar.org/air/italy/piaggio_p-23r.php