Mahjong game

We have had this game in our family for almost fourty years so it is at least that old don"t know where it came from, my dad kept it in the top of a closet and as kids we were not to touch it don't have any idea of origion but alwayse liked it. wouldn't know how to play but its mine now. I wish at least I had some idea just how old it is.I thought it was amasing how the dovetale was so small and and the workmanship is amazing