Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Latvia - Zeppelin Flight - 1932 (September 12-15), 7th SAF registered cover to Brazil, franked by three stamps, including Arms 2L blue and air post 15s red with perforation 10¾, tied by Riga ''7.IX.32'' date stamp, red connection and green confirmation markings, Pernambuco ''15.IX.32'' receiver on the back, VF, Sieger #183, C.v. €375++, Est. $300-$325, Scott #153, C7a