1937, Attempted Germany Trip, Belgian mail, printed matter card bearing 1.35fr. franking (insufficiently paid, should be 5.10fr., but not objected) from ”BRUXELLES 30.4.37” addressed to Berlin, despatch mark ”FRANKFURT 1.5.37”, red-lilac flight cachet and receiving mark ”KÖLN 3.5.37” alongside. Due to bad weather this flight was cancelled; mail was transported on board 1st North America Trip on 3 May. Not listed in Sieger but in Michel. Certificate Hofrichter.