British Horological Institute visited the workshops at the Old Royal Observatory, Greenwich to get a deep-dive look at this amazing watch while it was dismantled for conservation by Rory McEvoy. Larcum Kendall was commissioned to produce replicas of John Harrison’s ground-breaking H4 marine navigational watch. The watch used revolutionary technology, including tiny diamond escapement pallets, an interim re-winding device called a remontoire, and automatic temperature compensation. Learn about watchmaking and clockmaking, or get training to become a working horologist, with the British Horological Institute.
