Explorateur de timbres ↺ Scott or Y & T ? World Communications Year 1984 Regular Stamps (May 30, 1984) Sc 789 / YT 818 Sc 790 / YT 819 Sc 791 / YT 820 Sc 792 / YT 821 Sc 793 / YT 822 Sc 794 / YT 823