This jar was described in the printed catalogue with examples of Late Minoan I-II pottery in Case J but was located on the floor next to the throne. Its dark-on-light spiral decoration is typical of Late Minoan Ia pottery. It was excavated in the North-East House at Knossos.
Bibliography
Evans, Arthur. 1928. The Palace of Minos at Knossos, II, pp. 422-423, fig. 244
Myres, John (ed.). 1936. British Archaeological Discoveries in Greece and Crete 1886-1936, p. 25