Air Post stamps

1924, Aviation School, imperforated complete set of five as issued, including both color shades of 10c stamps, all are top sheet margin copies, except stamp of 1b, full OG, NH or LH (1), VF, Kessler or Sanabria guarantee hs on reverse, C.v. $1,000 as hinged

750.00

1930, Zeppelin surcharges on Lloyd Aereo Boliviano issue, complete set of three, full OG, NH, F/VF, expertized by G. Buhler and others, C.v. $240 as hinged

150.00