Mark 47 only

I was hoping to get some information on this 6.5"x 4.5" trinket box / Jewelry box that seems to be decorated by hand with butterflies, dragon flies and lady bugs? It does not have any fabric lining or padding inside I am mainly curious of the one and only mark " 47" .It is marked on the side of the lid and the box itself and matches up when it’s closed. I know this is the atomic number for silver but I have tried to find any other silver items online with just 47 mark and it seems to always be accompanied with some other marking. Was there a time period or maybe country when only mark 47 was used ?? Would very much appreciate any kind of information any one might have. Thank you so much!
inside silver box.jpg
47 silver.jpg
side front silver.jpg