A Parkinson and Frodsham marine chronometer, English, circa 1860, gimballed brass two day marine chronometer, Ernshaw style spring detent, silvered dial, subsidiary seconds, movement and dial signed Parkinson and Frodsham, change Alley, London, Se, serial No. 1564, within a dual hinged mahogany case 14 cm wide, 14 cm deep, 15 cm high