Българска народна банка

The obverse features the centrally placed nominal value number ‘500’, with the word ‘ЛЕВА’ (levs) and the year of issue ‘1997’ below. Above, on two lines, is the inscription ‘РЕПУБЛИКА БЪЛГАРИЯ’ (Republic of Bulgaria). The composition is framed by a stylised wreath of roses, tied with a ribbon.

The reverse of the coin features the coat of arms of Sofia City and the North Atlantic Treaty’s emblem to the left, surrounded by the inscriptions ‘ЗА АТЛАНТИЧЕСКА СОЛИДАРНОСТ’ (For Atlantic Solidarity) and ‘СОФИЯ ⋅ 1997’ (Sofia ⋅ 1997).