1912-1913 "ΕΛΛΗΝΙΚΗ ΔΙΟΙΚΗΣΙΣ" overprint, 5dr. grey-blue, u/m. Additional error "spot in the middle of O so that resembles a Θ". Signed by A.Argyropoulos. Certificate by A.Zeis (2004). THE ONLY KNOWN UNTIL NOW WITH THIS ADDITIONAL ERROR. VF. RRR. (Hellas 281Σ25 - 2310 euro).