Kalle Slaap examines a 1915 Vacheron Constantin mono-pusher chronograph and quarter repeater, a timepiece he considers one of the most elegantly designed in the world. He uses a microscope to detail the movement’s “breathtaking” complexity, highlighting the organic, flowing lines of its hand-finished steel components and the microscopic precision of its gear teeth. Kalle also demonstrates the watch’s auditory quarter-repeating function and discusses the masterful heat treatment required for its delicate springs, all achieved decades before the advent of computer-aided design. The presentation offers a deep dive into the historical significance and technical artistry of this high-complication pocket watch, which once belonged to a prominent figure in British aviation.
