Switzerland 1931 Dual 2nd and 3rd South American Flights on Reply Card

Switzerland 1931 (Sep 15) Dual 2nd and 3rd South American Flights on Reply Card. Switzerland C3, C10, C15 with "Assemblee de la Societe Des." postmark on 2nd SA Flight. Friedrichshafen Sep 18 postmark and Bahia Sep 21 backstamp. Then held for 3rd SA flight.. Brazil franking with Bahia Oct 22 pmk and Friedrichshafen Oct 28. Unusual combination of 2nd and 3rd SA flights. Unlisted as such in SLH, similar to 162D, 164D. 5 line red cachet to rio. VF and rare from League of Nations and mixed flights.