Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 1
Lot 162:
1913 (March 30), Burgdorf – Bern, 50c green on yellowish paper, used on Oskar Bider postcard to Bern together with 5c green, fresh and VF (H. Renggli certificate), in addition stamp of 50c dark green on white paper, appearing NH, but expertly repaired, SBK #IV, IVa, CHF1,200 for card only, Est. $300-$400
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