On the eve of WWII, Paris Delage dealer Walter Watney partnered with Delahaye to build competitive race cars under the historic Delage name.

According to an accompanying report by historian Michel Courtonne, the 3-Liter Delage race car, chassis 51820, competed in the 1939 24 Hours of Le Mans, driven by Louis Gérard and Armand Hug, before retiring in the 14th hour.

In 1940, it competed at the 1000 Miglia but failed to finish.

Chassis 51820 was later confiscated by the Italian government, and pieces from the car may have been combined with components from another Delage in Belgium in the 1940s, which competed locally before dropping out of sight.

An accompanying 1966 Bill of Sale copy cites the transfer of 51820 from Fritz Schlumpf to Mr. Catellati, who in turn sold it to French Delage enthusiast Joel Humbert. ‌ Beginning in 1991, M.

Humbert dutifully reconstructed the Delage and, following a multiyear effort, the car was granted an FIA Historic Technical Passport in 1997.

In 2002,...