PARKINSON & FRODSHAM No.2327: A two-day marine chronometer, the silvered dial signed Parkinson & Frodsham, Change Alley, London, No.2327 subsidiary seconds dial at VI, Roman hour chapters, Arabic 5-minute intermarkers, (lacking hands and hour wheel), top-plate inscribed Parkinson & Frodsham, change Alley, London, Earnshaw escapement, spring foot detent with jewelled pallet, blued steel helical balance spring, the top coil pinned to "gallows" cock mounted over the balance rim, the whole contained in brass drum dust protector with cross-springing on underside, brass bowl and gimbal in plain three-tier mahogany box with external drop handles, the front of the bottom section with a bone ivory disc engraved with a crest of a demi-lion rampant, the centre section with a bone ivory rectangular plaque inscribed Parkinson & Frodsham, London