Initial Marking: B&S

Location: Chicago, Illinois

Years of Operation: 1869-c.1874

Successor: Blauer Watch Case Co.

John Frederick Blauer and August Sperry.

Identification: Cases are generally emobossed with "Chicago" and "B&S." The word "Coin" is typically embossed within a pointed ribbon. Some cases feature stamped markings instead of embossed.