Dr. Alexander Klemin Award presented by Jack E. Leonard (left) to  Friedrich L. von Doblhoff, Chief Engineer of McDonnell Aircraft, for notable achievement in the advancement of rotary-wing aeronautics, at annual Forum 14 awards event.

VFS' (formerly AHS) 14th Annual Forum & Technology Display, April 16-19, 1958,  Washington, D. C., USA

Source: Vertiflite (AHS Newsletter) May 1958 (Vol.4, No.5)