Auction # 2333 WORLDWIDE + ARGENTINA: General September auction

Interesting airmail cover sent from (according to the inscription on back written by the sender) DUISBURG to Buenos Aires on 1/JUL/1937, franked with 1.75Mk., cancelled on 1/JUL in DÜSSELDORF (the 75Pg. pair) and on 3/JUL in FRANKFURT (the 25Pf. stamp), VF quality, interesting!