Worldwide Air Post covers, 1912-27, five different cards or covers: U.S. incl. no. C9 first day cover (tied on reverse of a transcontinental round trip flight cover between N.Y.--S.F. and an Amundsen North Pole "Maud" Expedition flight cover (AAMC#1021), latter with a tiny portion of the address erased), two different German pioneer air post semi-officials on separate flight covers (one is an unflown handback, other is flown, Michel DM600), and Switzerland nos. C3-C12 (complete set) used on single large registered cover (Scott retail of used stamps $167.25), mostly fine lot

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Details

Worldwide Air Post covers, 1912-27, five different cards or covers: U.S. incl. no. C9 first day cover (tied on reverse of a transcontinental round trip flight cover between N.Y.--S.F. and an Amundsen North Pole "Maud" Expedition flight cover (AAMC#1021), latter with a tiny portion of the address erased), two different German pioneer air post semi-officials on separate flight covers (one is an unflown handback, other is flown, Michel DM600), and Switzerland nos. C3-C12 (complete set) used on single large registered cover (Scott retail of used stamps $167.25), mostly fine lot

Special notice

This lot is offered subject to a reserve, which is the confidential minimum price below which the lot will not be sold.