4 values complete set "K.Π." surcharges on Corfu local issues with black two-line surcharge with two-line invalidation of former face value. Hard to seen in an auction. The 10 lep./50 lep. and 20 lep./50 lep. with A.Zeis certificate. The 20 lep./50 lep. with hinge (Hellas C43/C46)