The present chronometer features an “Extra” movement designating its high quality and finish. Patek Philippe’s stellar reputation is based both on its innovative design, as well as its technological mastery. Each caliber produced by the manufacturer is made to exacting specifications and guidelines, including jewelling to the train and escapement, the end-stone must be centered on the baseplate, the going train must be angled above and below with polished sink, the winding mechanism must meet registered designs, steeled parts must have polished angles just to name a few. The movements that qualify as “Extra” have more requirements including, jewels set in gold chatons, often with counterpoised straight line lever escapements, micrometer regulators and eight adjustments.

With a Guillaume balance, “Extra” movement, gold wheels and diamond end-stone the watch was meant not just for timekeeping but for precision timekeeping. In excellent original condition this watch is sure to impress any collector for its highest quality and workmanship.