60 Pfg on 40 C. Airmail, overprint plate I, block of four on postage exceeding tariff rate registered airmail cover from \"Memel *2 13.10.21\" to Chemnitz with arrival postmark, faultless condition, from the \"Trübsbach correspondence\", an in multiples rare stamp, photo expertize Haslau BPP (12 / 2020) \". Genuine, block of four on postage exceeding tariff rate registered mail through airmail transported, with arrival and flight confirmation stamp on the back, perfect with genuine stamp\", Michel 800.- plus