A good 19th century marine chronometer in three tier brass bound mahogany case. The 3 1/4 inch silvered dial signed J & a Walker no 258. Pool Lane Liverpool. Two day fusee and chain drive movement with Earnshaw spring detent. Helical blue steel balance spring with diamond end stone. Movement in brass bowl with shuttered winding hole and gimbal fittings. Height 18 cm. mmLength 16 cm. mmWidth 16 cm