1896 1st Olympic Games. Part of a registered letter bearing 2 pairs, 1 block of 3 and 4 blocks of 4 of 2l. (total 60l. postage) and posted from "ΑΘΗΝΑΙ-3*22 ΜΑΡΤ. 1897", arr. "CONSTANTINOPLE* AP 5 97". ONE OF THESE BLOCKS IS "INTERPANNEAU", ONLY KNOWN PIECE ON COVER TILL NOW. (Hellas 110).