40l. Historical in left margin horizontal pair with "Argostoli" ovpt. only on left stamp and only "Cefalonia e Itaca" because of overprint displacement up. Right stamp only "Cefa.....e Ita....". Ovpt. pos. 1-2 and 4-5. ONLY ONE UNUSED COPY IS KNOWN. Signed by Sorani and A.Diena and certificate by. H.Avi (2015). RRRR. (Sassone 14Aob).