Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Netherlands Indies - Zeppelin Flights - 1936 (August 1), Airship Hindenburg Olympic Flight cover from Surabaya, franked by three adhesives, tied by ''24.7.36'' ds, red flight marking, Berlin ''1.8.36'' drop hs, address partly erased, still F/VF and scarce, Sieger #427, C.v. €450, Est. $300-$350, Scott #178, 181, C18