I believe the material is wood. I don't know the age. There are two three-leaf hollyhock crests (mitsuba aoi mon), one of which is a cutout. I bought it at an antique market. The shop owner said that his ancestor was a hatamoto (direct vassal of the shogun) and had a close relationship with the Tokugawa family. He said he received many items bearing the hollyhock crest when he won at Go.