5l/50l. 1917 "Κ.Π." Surcharges on Campaign stamps in mint strip of 3. On left stamp single surcharge, on middle stamp double surcharge and on the right stamp double surcharge with error "Κ..Π". Right stamp u/m, the rest hinged. Left stamp with faults. Very rare. (Hellas C18+C18b+C18bVII).