Flying Mercury stamps overprinted with K.Π and new values

1 Λ. 1917

Греція

black overprint

Charity Tax stamps

Ionian Islands Earthquake Fund - Phaneromeni Ruin, Zakynthos 4 грн	overprint on Mi 391 with new value 9 грн	Violet imprint "Postal Staff Welfare Fund" 17 грн	Restoration of Thessaloniki Monuments Fund - St. Demetrius 2 грн
Overprint on Mi Z63	Stamp overprint	Red imprint "Postal Staff Welfare Fund" 4 грн	Red overprint on 1939 issue for postal fund tuberculosis 14 грн
Postal Staff Welfare Fund	Postal Staff Welfare Fund 7 грн	Postal Staff Anti-Tuberculosis Fund 10 грн	Overprint on 1937 stamp for postal staff antituberculosis 9 грн