20 Pfg crown / eagle, vertical pair, as well the upper stamp with plate flaw CP 420 \"left upper corner slightly bevelled\", on properly franked double heavy letter from Postmark with Upper Circle Segment \"TIENTSIN KDPA 30 / 11 97\" to Feldkirch / Austria with arrival postmark, in perfect condition perforated, in the perforation a little having mould stains, envelope with vertical archive fold, inconspicuous creases and owner marks, despite the restrictions commercially used letter with rare franking and by the plate flaw especially attractive, detailed new photo expertize R. F. Steuer BPP (2021)