Description
1941(May 24) Society of Chemical Industry, Basle printed airmail envelope to New York endorsed in red ink 10gr bearing Air 1f & 70c (SG 420 & 419 making 1.70f rate) tied Basel cds & with PC90 Opened By/Examiner 6155 label & on reverse unframed 1941 Jun 4…AM 9.28 arrival in violet