Obverse: profile portrait of Albert I, King of Belgium, and laurel branch; "ALBERTO I REGNANTE / ACADEMIA SCIENT. LITT. ET ART. / BELGICA CENTESIMUM QUINQUACESIMUM / NATALEM SUUM CELEBRAT ANNO MCMXXII" under profile. Reverse: classical figures with various offerings at bottom of and ascending stairs to structure; sun rises in background; "PROSIT PATRIAE LABOR PROSIT ET HUMANO GENERI" at top left. Signed "Victor Rousseu" at bottom left, on border. "J. Fonson" stamped on bottom edge.