Fine antique folding pocket magnifying glass (loupe) with swivel protective casing, historically used by jewelers, watchmakers, and collectors. Material: Precious metal (Silver / Silver-plated / Gilt). Features maker's hallmarks / assay stamps on the hinge fold and arm. Estimated Period: Late 18th Century to Early 19th Century. Features: Folding mechanism with loop attachment for pocket watch chain. Original glass lens in good condition. Condition: Exellence antique condition with a charming original age patina. Swivel mechanism functions smoothly. Please inspect the images carefully for exact visual details and condition.