1930, Zeppelin issue, surcharge or overprints on Aviation School stamps in various colors, set of six (without No.C13 and C17), nice quality, full OG, NH, mainly VF, C.v. $450 as hinged

200.00

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

200.00

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 se-tenant errors possible

750.00

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

300.00