Lot 32048 – 1920 (March) 10c Pilots & Planes, apparent partial PROOF sheet of 68 (of 72)

1920 (March) 10c Pilots & Planes, apparent partial PROOF sheet of 68 (of 72) on bright white surface-coated paper (rather than the slightly yellowish paper used for the issued stamps), missing only the BL corner block of 4, couple margin faults but all stamps very fine, on the reverse three August 1933 ms affidavits of the printer, a notary and a gov’t. official attesting that the sheet was printed by Sr. Valiente and with two 20c revenues tied, so UNIQUE thus. Accompanied by 1920 (October) 10c Plane, Mountains & Water, part-sheet of 60 (of 72) of both designs in alternate rows (Sanabria n° 12-13) in green on yellowish paper, lacking a block of 12 from TL corner of sheet, one stamp (pos. 3 damaged and repaired by tape, stained thereby), C. Valente printer’s name at BL, about fine