Initial Marking: MB

Location: Boston, Mass.

Years of Operation: 1861-c.1898

Specialized in Gold Cases.

Specialty: Gold and Silver Cases, Case Repair

Identification: Cases manufactured by Margot Bros. can easily be identified by the embossed "MB" mark appearing within a shape like an open book. Some cases are additionally marked with symbols like a lion or the karat indicator within a shield. Some jeweler-labeled cases were also produced by the company, such as those provided for E. Howard movements. These cases are generally still marked with the familiar "MB" accompanying other marks. Some cases feature a large oval mark with the karat indicator, very similar to the mark used on cases manufactured by Waltham. Some cases are additionally marked "E.F.M.," presummably for Eugene F. Margot. Patented case designs are represented in a small number of cases by Margot Bros., typically marked with the patent date.

Collectibility: Margot Bros. cases are somewhat uncommon compared to the larger gold case manufactures such as Brooklyn. Cases are typically characterized by fine engraving, and the intrinsic metal value makes them desirable by collectors. The patented designs by Margot Bros. are represented in a small number of cases, typically marked with the patent number. These patented case designs are slightly more collectible than the standard Margot Bros. cases.