https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=mid%20century%20musical%20jeweled%20egg%20ring%20box

Many of these are imported into the US and other countries !! Also are frequently bought as souvenirs from trips to Europe !! Hundreds of different patterns,, some very elaborate intending to copy the Faberge` eggs !! Unless a name is attached there is no way to know who the maker was !! Sorry !!