Thank you all!
Here is a photo of the item:
It was found in my fathers collection af Brittish 18th c silver collection, I was a bit surprised to find it there. I've bought CHINESE EXPORT SILVER 1785-1940 THE DEFINITIVE COLLECTORS’ GUIDE RESEARCHED AND WRITTEN BY ADRIEN VON FERSCHT. Is this the reference guide you guys are using as well or is it more out there?