I have a milk pot and the silver hallmark shows it was from Sweden and the year mark is Z3, I think it was made on the year of 1830. The silversimith is HGT. I didn't find any information on this silversmith. Please help me to identify.
An other question is that the HGT was marked with the silver control mark on the pot neck and it was also marked on the bottom of pot. Why it was marked twice on the same pot?
Thank you very much.