220 together with large single circle postmark "FRANKFURT A / M. railway station. 28 / 3" on postal union cover 9 Kr. over railway mail Coblenz / Cologne to Düsseldorf (Ausgabestpl) . The number cancellation was once again clear besides the stamp alongside. Stamp complete roulette. The number cancellation samples only to the stamp cancellation planned, therefore are unmailed strikes rare!