Philippines, Airmail, 1926, 16c Madrid-Manila Flight, red overprint. Pretty pastel shade, o.g., lightly hinged, Fine, very rare, only 100 issued; signed Sanabria, with 1989 P.F. certificate. Scott No. C8 $5,000. $0 (Image)
Philippines, Airmail, 1926, 26c Madrid-Manila Flight. O.g., lightly hinged, fresh and Fine, very scarce; with 1980 P.F. certificate. Scott No. C16 $6,250. $0 (Image)