Issued by Monaco, this elegant 25 centimes definitive stamp features a finely engraved left-profile portrait of Prince Rainier III, one of the most influential rulers in Monaco’s modern history. The classic bi-colour red and black design with crown emblem reflects royal authority and national identity. Produced in high-quality recess printing, the stamp formed part of Monaco’s long-running everyday postal series. Definitive issues of Rainier III are widely collected for their multiple printings, shades, and postal usages. A cornerstone item for Monaco royal or European monarchy thematic collections.