Glass pendulum in a light, mastered onyx case, 2nd half of the 19th century, brass gilded, all sides faceted glazed, brococo escapement with rubies in front of the dial, 2-part dial, gilded dial ring with Arabic numerals in the roundel, blued hands, French movement with 1/2 hour disc strike on gong chair with clay spring, mercury compensating pendulum. Round movement with 1/2 hour disc chime on gong chair with tone spring, mercury compensating pendulum, movement running, h. 38cm, w. 22cm, d. 16cm