The capital of Helvetia following the Roman conquest of what is now Switzerland during the first century BC, the historical city of Aventicum (present-day Avenches) also served as the inspiration for the new Christophe Claret Aventicum, which debuted last week at the 2015 Salon International de la Haute Horlogerie. Located about an hour from the watchmaker’s manufacture in Le Locle, Switzerland, Aventicum has long been a fascination for the company’s founder, Christophe Claret, who worked with the Avenches Rom…