Decorative Gold English Verge

A 19^th Century English verge with three colour gold dial in a decorative open face case.  Full plate gilt keywind fusee movement.  Plain cock with diamond endstone, plain three arm polished steel balance with blue steel spiral hairspring, polished steel Bosley regulator.  Attractive three colour gold dial, engine turned centre and chapter for the applied red gold Roman numerals, gold hands.  Decorative engine turned 18 carat open face case with chased and engraved bezels pendant and bow.  Engine turned middle and back with a vacant circular cartouche, maker's mark "SB".