10 Centimos overprint in German text on 10 Pf. Reich post (official unpublished) being a block of four, 3 items mint never hinged, the right upper stamp with tenuous hinge trace, certificate with photograph Ronald F. Steuer VÖB: "except for one minimal rubbed spot on face by of the left upper stamp in perfect quality. " (stamps still completly not signed!) Michel 12. 000.-