A Kayserzinn pewter decanter modelled as a bird

A Kayserzinn pewter decanter modelled as a bird, by Hugo Leven, model no.4433, with hinged cover, stamped marks, 29cm. high Literature Paul Carter Robinson, 20th Century Pewter Art Nouveau to Modernism, Antique Collector's Club, page 49 plate 1.89 and on the cover for a comparable example Gerhard Dietrich and Eckard Wagner Kayserzinn Arnoldsche, page 139 plate 103.