A striking bi-colour issue highlighting the modernization of Sihanoukville, Cambodia’s principal deep-water port. The design combines a cargo vessel, coastal development map, and a portrait of Norodom Sihanouk, symbolizing national progress and maritime trade. The engraved red-and-black composition gives strong visual contrast typical of mid-20th-century Cambodian definitives. Issued during a period of infrastructure growth, it appeals to collectors of ships, maps, and political history. Clean examples are sought after for thematic maritime and Southeast Asia collections. A classic representation of Cambodia’s post-independence modernization.