Underglaze-Blue Decorated (Kosometsuke) Porcelain Abacus
青花「古染付」玩孩子紋瓷算盤
明晚時期

Length: 29.9 cm. (11 3/4 in.)
Height: 7.5 cm. (3 in.)
Depth: 13.9 cm. (5 1/2 in.)

Ming dynasty
Early 17th century A.D.