Bolivia 1924 — Air Mail & Zeppelin Collection OF Bolivia on 8 album pages containing four sunk die…

Description

1924-30., AIR MAIL & ZEPPELIN COLLECTION OF BOLIVIA on 8 album pages containing four sunk die proofs of frames only 1924 in issued colors, 10 c. Die Proof and set overprinted "Muestra" (Specimen), 1925 first flight special overprinted stamps "La Paz, A Oruro & A Sucre" including inverted variety La Paz (certificate), 1925 Airmail cover "ORURO COCHABMABA" (few tone spots), 1930 Aviation School issue with overprints for the Graf Zeppelin set and inverted varieties, metallic ink, double with one inverted overprints (extensive and scarce group including Sc.C13, C17!), 1930 Pan-American Flight Zeppelin surcharges, Proofs and inverted opt. (cert.) etc.