SJX Watches
Insight: The Keyless Works
Having previously examined concepts related to energy flow inside watch movements, from automatic winding to barrel capacity and gear tooth profiles, we now turn and look at how energy enters the movement through the keyless works. For the majority of watches, the crown is the sole component through which the owner interacts with the movement, for both setting the indications and winding. While these operations have become a matter of routine, they wouldn’t be possible if not for the keyless works. This underrated mechanism — usually hidden — deserves a closer look. From key to crown We owe today’s user-friendly dual-purpose crown, which can be used for both winding and setting, to French watchmaker Jean Adrien Philippe, whose last name is certainly resonant with all horology enthusiasts. A keen technician who had not found success in his homeland, Philippe was approached in 1845 by Antoine Norbert de Patek, a Polish watch merchant from Geneva. Patek’s then-partnership with François Czapek was going sour and the merchant was looking for a new, technically oriented associate. Shortly thereafter, Philippe was appointed as technical director at Patek’s firm. This unexpected fast track was due to Philippe’s innovation: the keyless, stem-wound movement. Although his French peers weren’t taken with the invention, Patek recognised the potential of keyless timepieces and sought to capitalise on — and further develop — the concept. Later in 1851, Patek, Philipp...
