Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 62:
1929 (September 26), 1st Switzerland Flight cover, franked by five Eagle stamps of 5pf-50pf, on-board ”26.9.1929” cancellation, Bern the same day arrival ds, VF and scarce, Sieger #35h, C.v. €350++, Est. $200-$250, Scott #C27-31
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