5 100 - 20 1000 M. Rhein and Ruhr Help complete, as well the 20 M. with left upper corner of the sheet, with colorful additional franking on correctly franked registered cover from "WILHELMSBURG 19.3.23" to Frankfurt with arrival postmark, in perfect condition, upper margin copies on cover are very rare, photo expertize farmer BPP (2016) "the test specimen is genuine and tariff appropriate for franked. Stamps perfect, cover of very good quality. ", Michel unpriced (already approximate 300.- for single stamps without upper margin)