printed mark Graniton, Bohemia, design J. E. Margold in 1909, production Graniton Co., Rydl & Thon Svijany-Podolí, pottery, square box with bell-shaped lid, glazed, height
See: Vídeňská secese a moderna 1900–1925, Moravian Gallery in Brno, 2005, pg. 104, pic. 200.