A two day marine chronometer

A two day marine chronometer, with a silvered dial signed Frodsham & Keen, 13 South Castle St., Liverpool, 4069, with subsidiary Up/Down and seconds dial, with a fusee movement, spring detent escapement, balance with free sprung helical spring, the brass case stamped 12823, with gimbal support in a three tier walnut and brass bound case with sunken brass side handles, the front with applied mother of pearl plaque signed FRODSHAM & KEEN, 4069, LIVERPOOL, 7.5in (19cm) h.