The Montbrillant Datora pays homage to the popular Breitling Datora watches from the 1940s. This self-winding chronograph not only features a complete calendar but also showcases a unique way of displaying the date. The day and month are shown in two apertures, while a half-moon pointer indicates the date around the dial. Along with a handy aviation slide rule and tachometer, this watch also has a 24-hour mode display, also known as "military time". Its mechanical prowess and attention to detail make it a true showcase of ingenuity. Model number: R2133012.B856.435X.