Air Post stamps and covers. 1936, Palm Trees, black surcharges ''six cents'' on 2c violet, 3c brown and on ''Official'' 1c green, complete set of three, very fresh, unused, no gum, VF, A. Fiecchi certificate, C.v. $750 (Image)

Air Post stamps and covers. 1936, Palm Tree, surcharged issue, complete set of three used on addressed FDC, cancelled ''Monrovia. 18.11.1936'', minor perforation soiling, still VF and scarce, C.v. $825 for used stamps off cover (Image)

Air Post stamps and covers. 1941, Three-Motor Airplane, inverted black surcharge 50c on 2c red orange, full OG, LH, VF and scarce, J. Stolow guarantee hs, C.v. $225 (Image)

Air Post stamps and covers. 1941, Seaplane, inverted black overprint on $1 blue, right sheet margin single, full OG, very light trace of hinge, VF, expertized by A. Diena, Stolow guarantee hs (Image)

Air Post stamps and covers. FIRST FLIGHT COVER: 1943, First Flight Liberia - USA, surcharges with obliteration of ''1941'', complete set of ten used on registered flown cover from Monrovia to New York, address is faded, all appropriate markings and arrival ds, mostly VF (Image)