Issued by Montenegro in 1910, these stamps commemorate the 50th anniversary of the country’s first postage issue (1860–1910). Both feature a dignified portrait of King Nicholas I, Montenegro’s longest-reigning monarch, framed by intricate oak leaf and laurel motifs. The green 5 para and red 10 para values highlight the nation’s historic postal heritage and its transformation into a recognized European kingdom. These stamps hold particular importance for Balkan philately, symbolizing Montenegro’s independence and national pride at the dawn of the 20th century. Well-centered with clear impressions, they are desirable additions for any serious collector of Balkan or royal issues.