Air Post stamps. 1934, Naples Exposition, 75c brown and red orange, top margin imperforated single with nice margins at other sides, very fresh, full OG, NH (LH on margin far away from the stamp), VF and very rare, only 25 imperforated stamps were produced, Sanabria and F. Kessler guarantees, C.v. $3,000 as hinged, Sassone #A3a, €13,000 (Image)