Stern Bros. & Co.

New York, NY
Founded by Nathan Stern and his sons Leopold and Isador Stern in 1871.  In 1912 the company split off into two separate companies:
Stern Bros. & Co. which handled diamond cutting and Goldsmith, Stern & Co. which carried on the thimble and jewelry manufacturing business.
The Stern Bros. anchor mark was used by Goldsmith, Stern & Co. after the split.