50 Pfg. on 5 M. numeral with overprint type IIIb on under-franked registered cover from Opole 14. 12. 20. with registration label "Opole O. P. D. " to Berlin Wilmersdorf, reverse sender adress notation cut out and cover three sided opened respectively a little shortened, stamp superb, signed vineyard BPP, catalogue value for single stamp 120,-