"An Useful information within the heritage of British watchmaking. Horology lovers of all ranges are sure to discover price here." Ming did not just slap the motion inside of a situation and phone it every day. The movements had been overhauled, updated, and refinished by La Joux Perret in La-Chaux-de-Fonds. https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/