An antique silver and horn pair case verge watch with sun and moon dial, the movement with pierced tulip design pillars signed Jam. Thwing, London, the silver dial with sun and moon aperture, the revolving disc indicating the hour, the lower dial engraved with scrolls and mask and signed in twin cartouche Thwing, London, the outer case veneered with red and black painted horn (defective), engraved and inlaid with a tree and house, with stud work border, suspended from a cut steel chatalaine.