Large part of cover fr. with 20l. blue, displaced C.F. (Kound. 63.16) and posted from "ΑΣΤΑΚΟΣ (55)*18 ΜΑΙΟΣ 77" (blue colour), post Office NOT MENTIONED in Koundouros study, arr. "ΠΑΤΡΑΙ (9)*20 ΜΑΙΟΣ 77". Stamp with faults. (Hellas 51b)