Antique Watch Chain Necklace / Bracelet

Set with rubies measuring app. 1.5mm in two taille d 'epargne, barrel slides, sliding over multiple chains, with T bar, swivel clasp and black enamel* details, fashioned in 18k. French. Circa 1870. Length 13 3/4 inches.
*Although vitreous enamel forms a hard, durable surface, it is susceptible to chipping and breaking upon impact.
**Some enamel missing.