2 EL covers from "MESSINA 20 and 27 DIC 64" (handwritten via Pireo) franked upon arrival with 10 lep.+ 20 lep.+ 80 lep. (total 110 lep.) instead of handwritten rate "112". Cancelled with "ΚΑΛΑΜΑΙ 20 and 22 ΔΕΚΕ.64" showing the lack of 2 lep. in this post office. A scarce example of postal history. On reverse transit cds of Piraeus and Athens (Hellas 18d, 19a, 22a)