Antique Pocket watch chain

JFS on antique jewelry typically refers to the renowned Victorian-era manufacturer John F. Sturdy & Sons.

Maker and Origin Manufacturer: John F. Sturdy & Sons, established in 1865 in North Attleboro, Massachusetts.Era: Most likely Victorian (late 1800s) or early Edwardian (1900s).Common Marks: You may see "JFS," "J.F.S.S.," or "J.F.S. & Sons" stamped on the clasps, T-bars, or jump rings.