Germania 1911 / 12, postage stamps Kosack ++ 10 Pfg Germania magenta, vertical se-tenant in the as usual manufactured stamp booklet perforation, in perfect condition mint never hinged, photo expertize Jäschke Lantelme BPP (2019) (for former stamp booklet pane borderless) : "in faultless, mint never hinged condition. ", Michel 4.800.-