Antique 1920's Chinese Mahjong Set 136 Pieces and 98 Sticks Bone and Bamboo?

Is it bone and bamboo?. Is it bone and bamboo, most sets of this age are typically bone and bamboo. 136 Tiles and 98 sticks. I buy and use new uLine boxes and bubble wrap. Hand painted. Not quite sure, but the base is porous, and the top is hard.