Small Silver Duplex Pocket Watch

A small 19^th Century English duplex in a silver open face case.  Keywind gilt Lepine calibre movement with suspended going barrel, polished steel Geneva stopwork.  Plain cock with garnet endstone, polished steel regulator, compensation balance with blue steel spiral hairspring. Duplex escapement, brass escape wheel, pivots with endstones.  Signed white enamel dial with subsidiary seconds, Roman numerals, blue steel seconds hand with gold arbor, gold Breguet hands.  Engine turned silver open face case with ribbed middle, wound and set through the silver cuvette, maker's mark "CBH".