This meaningful Greek commemorative pair honors two historic humanitarian figures: Henry Dunant, founder of the International Red Cross, and Queen Olga of Greece, a major contributor to Greek Red Cross development. The stamps feature finely engraved portrait designs with the Red Cross emblem prominently displayed, emphasizing their humanitarian theme. Issued in two denominations (4.50 Dr and 2.50 Dr), the set is popular among Red Cross, medical history, and humanitarian-themed collectors. Well-centered mint examples with clean margins are particularly sought after. A classic mid-20th-century European commemorative issue that fits well into thematic or Red Cross collections.