Obverse: the obverse depicts the coat of arms of the People's Republic of Bulgaria featuring a lion surrounded by wheat ears and a star. Below the emblem are the dates “681–1944”, while the inscriptions “People's Republic of Bulgaria”, “5 Leva”, and the year 1973 appear around the rim.
Reverse: the reverse shows a composition of insurgents and resistance fighters carrying a flag and participating in an uprising. Around the design appears the inscription “September Anti-Fascist Uprising”, with the year “1923” below.
About the coin: this coin commemorates the 50th anniversary of the September Uprising of 1923. During the era of the People's Republic of Bulgaria, the event was portrayed as an important symbol of anti-fascist and revolutionary struggle. The coin forms part of a commemorative series dedicated to significant moments in Bulgarian history.