Center piece from International Postage Stamp Exhibition souvenir sheet on slightly postage exceeding tariff rate registered cover with special cancel BERLIN / International Postage Stamp Exhibition 16.9.30 to Bratislava / Czech Republic with arrival postmark, accordingly special registered label, except for a small water spot left at the bottom of the 8 Pfg stamp excellent condition, cover small crease, enclosed original ticket to the International Postage Stamp Exhibition, in this kind especially attractive, Michel 900.-