20 pennies ultramarine (2) as different currencies additional franking on 1 Groschen breast shield postal stationery cover rose, cancelled by clear new single circle postmark "DORTMUND 1a 15.11.75", used as insured letter to Königsberg, reverse flap supplemented, the total document patina, apart from that faultless quality, a scarce 50 pennies franking from the last but one month of usage the breast shields, photo expertize Martin Wolfgang Sommer BPP.