天津 = Tianji/Tientsin
恒利 = Hengli, name of the firm
足紋 = Zuwen, means 'pure silver'
公 = Gong, an internal mark standing for the actually maker, or the foreman of the workshop, or something else.
Hengli is one of the most important silversmiths and jewelers in 1st half 20th century, Tientsin. Most of their capital, managers and workers were from Zhejiang province.