"An Informative guideline within the heritage of British watchmaking. Horology followers of all degrees are sure to find price here." Ming failed to just slap the motion in a case and call it every day. The movements were overhauled, up to date, and refinished by La Joux Perret in La-Chaux-de-Fonds. https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/