Richard-Penhoët 2 photo from Aero Digest January 1927
Aero Digest Magazine
Attribution
<a rel="nofollow" class="external free" href="https://archive.org/stream/aerodigest1019unse#page/4/mode/2up">https://archive.org/stream/aerodigest1019unse#page/4/mode/2up</a>