A brass-bound rosewood 8-day marine chronometer, No.3634, James Muirhead & Son, Scottish, circa 1865

4½-inch silvered dial signed James Muirhead & Son, Makers to the Admiralty, 90 Buchanan Street, Glasgow, 3634, subsidiary seconds and up/down dials, fusee movement with maintaining power, Earnshaw's spring detent escapement with compensation balance and blued helical spring, the escapement and upper wheel train mounted in a sub-stage, the brass bowl gimballed in a three tier case with brass mouldings, stringing and sunk handles, lacking plaque