Entire letter fr. with 2x2l. bistre, 5l. yellow-green, 1l. brown with horizontally laid background and 10l. orange on blue tied by "110" (Argostolion) cds, arr. "ΠΑΤΡΑΙ*11.ΜΑΡΤ.65". Handwritten "Δια του Ελλ. ατμοπλοιου". Very fine 4 color franking. Scarce. (Hellas 16b+17b+15b+18d).