How the first English clock with Bengali numerals and Swiss machinery came to Calcutta

Like most good stories, this one begins with a sweet tooth.
https://scroll.in/magazine/833345/how-the-first-english-clock-with-bengali-numerals-and-swiss-machinery-came-to-calcutta

Bucherer Aion Rolling Ball Clock Lucerne – World’s Largest Ball Indoor Clock at Swiss Watch and Jewelers Flagship Store

Bucherer Aion Rolling Ball Clock Attraction in Lucerne Main Store of Swiss Watch-maker
http://www.bargaintraveleurope.com/09/Switzerland_Bucherer_Clock_Lucerne.htm

Books on Watch and Clock Repair

Books on Watch and Clock Repair and working with Watchmakers Lathes. Practical Watch Repair, Practical Clock Repair, Clock Repairing as a Hobby, The E.J. Swigart Co., Illustrated Manual of American Watch Movements, Repairing Old Clocks & Watches, Watch & Clock Encyclopedia, Turning and Milling in Horlogy, The Watchmakers’s and Model Engineer’s Lathe Book, The Watchmaker and his Lathe, The Chronograph, its mechanism and repair, Modern Calender Watches, Le Manuel Suisse De L’Horloger-Rhabilleur ONLY IN French, The Watch, Principles and Manufacturing Methods Only available in French by George Daniels.
http://www.tztoolshop.com/page13.html