I just really like the ninth tile on the second row here which has a very good character seen on your discs.
I like the swan as the first tile in the third row too...which could be mistaken for the bird on your discs. And the flower/dot of the first tile on the first row which, in its own way, actually looks like a disc when you remove the petals.
Two designs of White Dragon at the bottom, with the left showing N, S, E AND W, or, as the reverse side of one of your larger discs, Mountain/Earth, water, wind and fire.
On the right side of White Dragon are variations of one and two men walking and also one being carried by another.
But certainly the early game of Mahjong was called 'sparrow' or Pinyin. The swan takes over from the sparrow/bird of your discs.
All right, I'll stop now. No use trying to offer up that you have a game that came before Mahjong, and that you might - after a little investigation - be in a most unique position to write something that would appeal to millions of people around the world who are Chinese and/or do play Mahjong.
But a currency that only applied to one single province and died out because it was overshadowed by a unified currency? Maybe worth a hundred books...in elite circles of such things...more likely museums who deal with ancient currency.
That was fun, though. I am really glad you posted such possessions of yours that no-one else has.
All the best with your work, David.