It is fully hallmarked for Birmingham 1827 - the maker's mark is hard to read but I believe it to be Tye and Kilner of Birmingham. It is approx 1-3/8" x 1" x 1/2 (37mm x 26mm x 12mm). The item "Superb All Over Silver Gilt Georgian Vinaigrette 1827" is in sale since Wednesday, September 2, 2020. This item is in the category "Antiques\Silver\Solid Silver\Vinaigrettes". The seller is "yudee" and is located in Nairne.This item can be shipped worldwide.