This 25-para commemorative from Montenegro, issued in 1910, marks the 50th anniversary of Prince Nicholas I’s accession (1860–1910). The deeply engraved design features a fine portrait of Nicholas I, framed by elaborate oak-leaf ornamentation symbolizing strength and continuity. Printed in a rich dark blue, this issue belongs to the celebrated Jubilee set released shortly before Nicholas was proclaimed King of Montenegro. The craftsmanship and historical relevance make it a desirable item for Balkan and royal-thematic collectors. Clean impressions and intact perforations enhance its appeal in both used and mint condition.