Italian aircraft designer <a href="https://en.wikipedia.org/wiki/Luigi_Stipa" class="extiw" title="en:Luigi Stipa">Luigi Stipa</a>
Unknown; credited to "<a href="https://en.wikipedia.org/wiki/Weider_History_Group" class="extiw" title="w:Weider History Group">Weider History Group Archive</a>"
Scanned from <i>Aviation History</i> magazine, March 2010, p. 19