Explorateur de timbres ↺ Scott or Y & T ? Marine Fishes 1973-1976 Regular and Airmail Stamps (1973) Sc 673 / YT 736 Sc 674 / YT 737 Sc C399 / YT PA514 Sc C400 / YT PA515 Sc C401 / YT PA516 Sc C402 / YT PA517 Surcharge (1976) Sc 693 / YT 751A Sc C440 / YT PA552C