Panama Canal Antique Sterling Silver Guilloche Enameled Large brooch rainbow Stamped on the barrel 800

Stamped on the barrel 800 BBS

Brooch has pendant attachment

Stamped on the reverse 925 NF

Stamped on the inside of the band 925 with an unidentified hallmark and China

mineral deposits

Panama Canal Antique Sterling Silver Guilloche Enameled Large brooch rainbow Stamped on the barrel 800Panama Canal Antique Sterling Silver Guilloche Enameled large brooch. Good used condition with little to no signs of normal wear. Great patina. Stamped in two places on the back Sterling hallmarks. Enamel is in good condition with no chips and smooth to the touch., Acid tests positive for sterling silver. Brooch measures 1 and 2 3rds of an inch across.