This Ingenieur SL “Jumbo” Ref. 1832 dates to about 1976, making it nearly 50 years old. A landmark design by Gérald Genta, it remains one of the most iconic and collectible Ingenieur models. Last serviced eight years ago, it arrived with pronounced scratches and deep dents – particularly on the case – requiring extensive restoration to return it to its original geometry. After the laser welding, Remo Stähelin now uses fine files to level the surfaces and restore each line by hand. Refining every