A French enamel and ruby vinaigrette pendant, the circular hinged vinaigrette applied with a cluster

A French enamel and ruby vinaigrette pendant, the circular hinged vinaigrette applied with a cluster of leaves, heightened with shades of graduated green and yellow enamel, interspersed with circular mixed-cut rubies, the reverse with pierced and engraved foliate decoration, suspended from a fine trace-link chain, each with eagle's head control mark, the pendant with partial lozenge-shaped maker's mark, pendant length 3.05cm, chain length 40.5cm Surface wear, nicks/minor chips and scuffs to enamel, but no apparent losses. Rubies have slightly variable pinkish-red hues and contain mineral, fracture and zoning inclusions, but have a lively appearance. Most have surface wear and small nicks/chips. The mount has surface wear, scuffs and nicks, commensurate for use. The cover closes fairly tightly to the base with a little gapping to the sides and has slight play to the hinge. Maker's mark to loop fitting is partial and illegible. Eagle's head marks to pendant and chain are clearly struck. Surface wear to chain, clasp is functioning, solder join/repair to end loop. The chain also has a lozenge-shaped maker's mark, possibly 'MC'. Gross weights approximately: pendant 8.5gm, chain 2.2gm.