Italian <a href="https://en.wikipedia.org/wiki/Piaggio_P.11" class="extiw" title="en:Piaggio P.11">Piaggio P.11</a> aerobatic <a href="https://en.wikipedia.org/wiki/Trainer_(aircraft)" class="extiw" title="en:Trainer (aircraft)">trainer</a> aircraft
Uncredited
www.aviastar.org/air/italy/piaggio_p-11.php