Souvenir sheet issue 1. Central office stamp exhibition the BAG philately on ribbed paper, watermark XI, neat cancelled with first day special cancel \"BERLIN W8 30.10.54\", photo expertize Schoenherr BPP: \"the souvenir sheet shows the special feature of an apparently ribbed paper, which through a deficient chalk up-stroke originated is. The souvenir sheet possesses the correct mass, is genuine, perfect. \", Michel 2.500.-