Medal silver alloy
diameter 7,6 x 0,6 cms 0,2 kg)

COMMEMORATING THE TWENTYFIFTH ANNIVERSARY OF GENERAL MOTORS 1908 1933
TO THE ADVANCEMENT OF MOTOR TRANSFORMATION


see also documentation Cooper  Hewitt' Smithsonian Design Museum. or website Clevelandart.org
Sold on e-bay in 2025 1.450 USD, and quoted up to 2.500-3000 

Artwork details  (source : Metmeseum.org ) : 
Title: Medal Commemorating the 25th Anniversary of General Motors
Designer: Norman Bel Geddes (American, Adrian, Michigan 1893–1958 New York)
Date: 1933
Medium: Silver alloy
Dimensions: Diam. 3 × 1/4 in., 0.5 lb. (7.6 × 0.6 cm, 0.2 kg

Bid on it above 1.000 euros please.