German swastika flag official trade flag according to the Dutch newspaper Het Vaderland dated 17 September 1935

An item reported that Essberger head of the German sea shipping sent radio telegraphic orders that on board of all merchant ships the German swastika flag was to be hoisted as official trade flag.(1)

Note

1. This must be John Theodor Essberger C1886-1959), Führer der deutschen Seeschiffahrt, and tanker ship owner at Hamburg. Germany who also had served in the German Imperial navy until 1924.