Tea set with M, M, and crown-over-c stamp

This piece comes from a tea set with a pot and creamer. All 3 are stamped with this M M Crown-C business, and i just cant figure out where it might be from. This is the sugar-pot; the creamer and pot are both broken but I can add them if they’ll be of any help. Any resources or help would be amazing!

This mark crops up regularly and was for a long while unidentified or wrongly attributed to a Spanish company. Meneses Orfebres. It is now thought to be most likely the mark of Eton Silver Inc. of Glendale, NY.