Rhenish "CYLINDER NECK" JAR Siegburg (near Cologne), around 13th ctry. A.D., dark glaze, intact, 25.5 cm, 10.2 in 260 EUR A very similar specimen in the Stadtmuseum Köln: S. Wirth, Mittelalterliche Gefäßkeramik (Köln 1990) No. 4.275.