Corinphila Auction 284-290 Day 4

1901: 50 st. deep blue & brown, a single example used on 1904 registered cover to GPO in Berlin handstamped "PCP" (Pour Certificate Postale), tied by bilingual "Sophia" cds (July 17). Three German Post Office serrated wafer seals in blue at top and reverse with Berlin (Aug 1) arrival cds. Central file fold well away from the adhesive, a scarce and early usage.