Identifying Silver Hallmark on Cig. Case Chinese???

Hi I hope sone one can help I have a beautiful Antique Cigarette Case that was my Grandfathers it looks to be chinese in origin or perhaps japanese. It features Dragons to the front with a Shield and a blossom tree and birds to the back. I hope some one can help. Please view photos the first is the outside of the case and the second is a picture of the hallmarks.
Thank you
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