1932 2nd SAF card registered from Riga to Buenos Aires, with Berlin connecting cachet and arrival pmk, rare registered and flown Zeppelin card Estimate: $500
1933 3rd SAF to Brazil, attractively franked, with Berlin forwarding cachet, minor adhesive toning and cover wrinkles, otherwise fine-v.f., with additional "Via Condor-Zeppelin" handstamp on back Estimate: $250
1933 3rd SAF to Brazil, attractively franked, with Berlin forwarding cachet, minor adhesive toning and cover wrinkles, otherwise fine-v.f., with additional "Via Condor-Zeppelin" handstamp on back Estimate: $300