True to English watchmaking heritage, Arnold & Son unveils the TES Tourbillon, with the hand-finished A&S8100 calibre with sapphire barrel bridge. This defining timepiece is part of the Royal Collection which combines classic styling with leading-edge technology. The tourbillon movement, one of the most elegant complications in the world of horology, has played a crucial role in Arnold & Son’s history. An exceptional watchmaker, John Arnold was an active participant in one of the most extraordinary partnerships in the world of innovative horology. Indeed, both he and Abraham Louis Breguet worked closely, sharing both their knowledge and passion. Evidence of their partnership is Abraham Louis Breguet’s first ever tourbillon mounted in John Arnold’s No. 11 movement, a watch that can be found today in London’s British Museum.