20e anniversary of UNESCO

Each sheet contains 6 stamps as a whole they depict a reproduction of the Peter Colfs tapestry from the lobby of the General Assembly Building in New York City, and one stamp with the UNESCO emblem plus a label.

No “official” First Day Cover exist

Made First Day Covers (FDC). Here one examples, probably different ones exist.

“BURUNDI JOUR D’EMISSION 4-11-66”