BERLIN POST-EXP. 23.25 / 11 71 - single circle postmark with 2, 5 mm high characters, KBHW 489, on liable to payment of postage official matter letter with North German Postal District official stamp 1 Gr. to Calau. The stamp was from 6.11.1871 to 04.12.1876 in use and is on with North German Postal District stamps stamped documents rare, there those only to to the 31.12.1871 possible are. KBHW valuation 750 points