baumann

1920's tournament in France was the final Gordon Bennett Aviation Trophy race, a competition that was held six times, and began in 1909.
"The Gordon Bennett Aviation Trophy was an international airplane racing trophy awarded by James Gordon Bennett Jr., the American owner and publisher of the New York Herald newspaper. The trophy is one of three Gordon Bennett awards: Bennett was also the sponsor of an automobile race and a ballooning competition."
The pictured plane competed, but did not finish the race.
en.wikipedia.org/wiki/Gordon_Bennett_Trophy_(aeroplanes) See also

This is the Dayton-Wright RB-1 Racer, built to compete in the 1920 Gordon Bennett Cup (like the Verville-Packard R-1 Racer also in the most recent posting of Bain photos). It is still extant as an exhibit at the Henry Ford Museum. See: en.wikipedia.org/wiki/Dayton-Wright_Racer

"Dismantled and shipped to France, the RB-1 was flown by Howard Rinehart in the 28 September 1920 race, but was forced to withdraw after a cable failure prevented full retraction of the gear/flap mechanism,"
en.wikipedia.org/wiki/Dayton-Wright_Racer
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Princess Adelgunde of Bavaria (Full German name: Adelgunde Marie Auguste Therese Prinzessin von Bayern) (born 17 October 1870 in Munich, Kingdom of Bavaria; died 4 January 1958 in Sigmaringen, Baden-Württemberg, Germany) was a Princess of Bavaria by birth and Princess of Hohenzollern through her marriage to William, Prince of Hohenzollern The marriage took place on 20 January 1915 in Munich. Her husband is here:

trialsanderrors: thanks for the information. We'll update the record with the additional information.

11 years later, after her marriage to Wilhelm/William at the age of 44: