I have looked through this site, a few site's online and a couple of books. Starting to think I suck at this. Would love for someone to help me learn who the "GD" hallmark is? it does not seem to match Gerorge Day or have any British Assay marks. Also, what is the oval shape mark to the right of the 925? These are tho only marks I can find and they are repeated on other parts of the hunter case. The movement would date this case to somewhere between 1815 - 1850.