CH 1938 J85-J88 Pro Juventute FDC with address (Registered mail)

Switzerland 1938 J (Pro Juventute issues)
Pro Juventute - Portrait of Salomon Gessner and Swiss women's costumes, SBK J85-J88, Michel 331-334,
FDC illustrated envelope (Format C6) with address (registered letter), cancelled 1.XII.38 Zürich 32 Seebach, transported to New York USA, on the back arrival stamp New York 10.12.1938, Hintermann letter, in very good condition, very decorative.