Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 163:
1937 (June 5-20), 6 mixed franking covers of KLM Direct and Return ”New Tariffs” Flight Amsterdam – Bandoeng – Amsterdam, including 4 with Charity pre-print ”For Benefits of National Aviation Fund”, placed to the mail at Bodegraven, Gravenhage, Leiden and Naarden, 2 with Air Mail pre-print or plain envelopes sent from Amsterdam Central Station or Scheveningen, each one franked by two, three, four or six Dutch adhesives and uprated by Indies Queen Wilhelmina 20c red lilac on reverse, flight markings, mostly VF, Est. $350-$400, Sc. # 144, C10
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