2 Gr. North German postal district with neat postmark CONSTANTINOPEL N. PA. 17. 1. (without year date) on piece, very scarce cancellation, certificate Steuer BPP (2017) "the existing stamp possesses an almost full and very rarely print of a postmark without year date with all features of an authentic and date-appropriate cancellation, the so only from 1.-24. January 1871 possible was. The piece is in legitimate condition with some not perfect perforation and a small split crack in the 4. perforation hole left above. " Steuer 5. 250.-