This lovely seed cup is porcelain done in a sage green luster glaze. The side is impressed Japan and the base is stamped "Made in Japan." You can barely see the impressed Japan on the right side of the cup in the first picture. The impress is a bit faint and the luster glares when photographed, so it is difficult to show it, but it is there as is the base stamp. The cup is 3 1/8 inch tall overall and about 2 1/4 inches wide. The tab on the back measures 3/4 x 3/4 inch. There are no chips or cracks in this nice cup. There is a faint line n the back from a metal cage bar and very minor rust next to the tab.