Pearl Set Gold and Enamel Pendant Watch

A small early 19^th Century Swiss verge in a pearl set gold and enamel full hunter case.  Full plate gilt fusee movement.  Finely pierced and engraved bridge cock with polished steel endstone, plain three arm gilt balance with blue steel spiral hairspring.  Silver regulator dial with blue steel indicator.  Winding through the white enamel dial, Arabic numerals, gold Breguet hands.  Gold full hunter case, the bezels set with two rows of split pearls.  Both covers with engine turned centres bordered by light blue champleve enamel.  The front cover opened by depressing a button in the pendant.