Cover fr. with 5l green in vertical pair, 1l brown-red and 2l pale-bistre in strip of 5, 2 lepta stamp perf. 13 1/2, while 1l+5l stamps perf 11 1/2, canc. "ΑΘΗΝΑΙ*4.ΜΑΡΤ.91", arr. "MUENCHEN*17.MAI.91". Postage 25l. for a letter up to 15 grams. Very fine and scarce. (Hellas 95b+97+107).