It was combined with the Valz Prize (Prix Valz) in 1970 to create the Lalande-Valz Prize and then with a further 122 foundation prizes in 1997, resulting in the establishment of the Grande Médaille.
Det slogs 1970 samman med Valzpriset (Prix Valz) till Lalande-Valzpriset och med ytterligare 122 priser 1997, vilket ledde till instiftandet av Grande Médaille.