Gold Quarter Repeating Verge

An early 19^th Century Swiss quarter repeating verge in a gold open face case.  Full plate gilt fusee movement.  Finely pierced and engraved bridge cock with garnet endstone, plain three arm gilt balance with blue steel spiral hairspring.  Silver regulator dial with blue steel indicator.  Push pendant quarter minute repeating on two steel gongs. Winding through the white enamel dial, Arabic numerals, blue steel Breguet hands.  Engine turned 18 carat open face case with ribbed middle, sprung gilt metal cuvette.