Participation medal issued for the Prague 1925 Eighth International Olympic Congress. Silvered bronze, 45 mm, 49 gm. The front features a view of the Charles Bridge and Hradschin Castle encircled within raised text, "Mezina'rodni Kongress Olympijsky, Praha 1925"; the reverse bears an oak branch with rings and scroll bearing the Olympic motto encircled by raised text, "Congres Olympique International, Prague 1925." Complete with its rare original box, with a "Karnet - Kysely, Praha - XI" label on the bottom; corners of the box top are split.