I want to take a step back from the cliff edge.  I know we can all be a little trigger happy when we see something we have not seen before, bang bang what ever it is its dead now 

 . However the use of coral and turquoise is very common in areas bordering the lands that use dha.  All along the Himalayas, Tibet , China.  I believe this little box with enamels is from the Burma/China/Thai area.  I am not trying to rock the boat or challenge oppinion, I just feel this might be to us an oddity that could well do with more research.