the mark is upside down and reads "tian bao wen yin" in 2 columns starting on the right. tian bao is probably a shop name meaning "treasure of heaven" and "wen yin" means "fine silver"
looks like it reads in two vertical columns, starting on the right: "Shi Dabin zhi", where Shi is the maker's surname, Dabin the given name, and zhi means manufactured by