Cover fr. with 3x20l. blue (pair + single) and 5x2l bistre Paris issue (strip of 3 and 2 singles) tied by "68" (ΚΕΑ) cds and canc. "ΚΕΑ*17....", arr. "TRIEST....." to pay the prepaid Greece - Austria rate according to 04/1867 treaty. Late use for 2 lepta Paris issue stamps. Fine and rare. (Hellas 19b+2a).