1991 Guyancourt Medal
This was some sort of presentation medal. Here is what Scott Dickson says about it:
"The Guyancourt medal was placed around my neck immediately after finishing. Opperman, the 1931 PBP winner,
was waiting at the finish line and also received one. I do not know the significance of the medal."
(Source: Scott Dickson)
Photo from the 1991 Plaquette (follow-up booklet)
Hearst - Opperman - Dickson
Photo: Thierry Deketelaere