Oh, as well, there were two versions. As noted type 1 & this auction which would be type 2.
The China Mint did not like the design of the type 1 so (probably) with the design change
came the different display in a capsule, sized (to hold the 3 tael with the insert) was
part of the furnished release. The capsule size actually is for a 5 oz. silver medal/proof.
Thanks