Netsuke old large bone mask japan grimacing character. 19th century

Netsuke old large bone mask japan grimacing character. 19th century very beautiful and large japanese netsuke bone mask from the 19th century. Text engraved on the back. Most masks are approximately 4 cm - 1.57 "this one is 13 cm - 5.11 " origin: japan a break on the top left. Height: 13 cm - 5.11 " width: 11 cm - 4.33 " depth: 4 cm - 1.57 " weight: 311 g.