1930, Zeppelin issue, surcharge and overprints on Aviation School issue in various colors, 5c/10c, 10c-1b, set of six values without #C13 and C17, full OG, mainly LH, VF, the high value with several experts' hs on reverse, C.v. $450

150.00

1930, Zeppelin issue, brown overprint on Aviation School stamp of 10c vermilion and black, full OG, previously hinged, VF and rare, only 50 stamps were produced, Sanabria and others guarantees on reverse, C.v. $2,500

750.00

1930, Zeppelin issue, inverted violet overprint on Aviation School stamp of 15c carmine and black, bottom sheet margin block of four, full OG, NH or LH (top stamps), VF, C.v. $400 as hinged singles

300.00

1930, Zeppelin issue, red overprint on Aviation School 25c dark blue and black, horizontal pair, left stamp with inverted overprint, while right one has double overprint, full OG, LH, VF and extremely rare, only a few such errors possible

1930, Zeppelin issue, inverted red overprint on Aviation School stamp of 25c blue and black, bottom sheet margin block of four, full OG, NH or LH (top stamps), VF and scarce multiple, C.v. $600 as hinged singles

400.00

1930, Zeppelin issue, inverted brown overprint on Aviation School stamp of 50c orange and black, full OG, LH, VF, Champion guarantee hs, C.v. $225

100.00

1930, Zeppelin issue, double (one inverted) green surcharge 5c on Aviation School stamp of 10c vermilion and black, full OG, previously hinged, F/VF, C.v. $200

100.00

1930, Zeppelin issue, blue overprint on Aviation School stamp of 10c vermilion and black, horizontal pair, right stamp has double (one inverted overprint), full OG, VLH, VF, C.v. $220 as two singles

150.00

1930, Zeppelin issue, bronze inks of various color surcharge or overprints on Aviation School stamps, 5c/10c, 10c-25c, full OG, LH, VF, each stamp properly expertized, C.v. $420

150.00

1930, Zeppelin issue, bronze ink of green surcharge 5c on Aviation School stamp of 10c vermilion and black, block of four, full OG, NH or LH (top stamps), VF, C.v. $480 as hinged singles

200.00

1930, Zeppelin issue, bronze ink of copper surcharge 5c on Aviation School stamp of 25c dark blue and black, bottom sheet margin block of four, full OG, LH, VF, C.v. $400++

150.00

1930, black "Z" normal and inverted surcharges 1.50b/15c-6b/35c, two complete sets of three, low value with inverted surcharge has insignificant thins, full OG (#C26a unused, no gum), hinged, F/VF, C.v. $1,265

300.00

May 14-June 6, 1930, Return First SAF cover from La Paz to Friedrichshafen via Lakehurst, addressed to Berlin, franked by set of six surcharges on Aviation School stamps, and Zeppelin surcharges on Lloyd Emblem complete set of three, tied by La Paz special date stamp, Bolivian and American confirmation cachet were applied, Friedrichshafen "6.6.30" arrival marking, light fold away from the stamps, mostly VF, C.v. $690 for stamps off cover

600.00

May 14-June 6, 1930, Return First SAF from La Paz to Friedrichshafen via Lakehurst, addressed to Liverpool, franked by pair of surcharges 1.50b on 15c green and two other surcharged values, tied by La Paz special date stamp, Bolivian and American confirmation markings were applied, Friedrichshafen "6.6.30" receiver, mostly VF, Sieger #60 var

100.00