M.I.V.- Unascribed Circa 1820
This is makers mark 178 in Cape Silver by Welz (page 158), where the specific placing of the dots is clearly illustrated. This mark is also recorded by Heller in Further Researches in Cape Silver Vol. 11, mark N.M.M 56, page 126, also with the unusually placed dots clearly illustrated.
M.I.V.- Unascribed Circa 1820