Cover (with letter inside, written on 30 Sept. 1917) fr. with 10l. "ET" + 5l/50l. "KΠ" (used as regular stamp) cancelled with "ΝΕΟΝ ΦΑΛΗΡΟΝ", arr. "ΝΑΥΠΛΙΟΝ*3 ΟΚΤ. 17" with censors canc. "1". The "ΚΠ" surcharged stamps were valid for payment of the basic postal rates from "7.9.1917" until "18.10.1917". RRR. (Hellas page 501 (introductory note) and Ntais page 24, Hellas C10).