Manufactured in 1916, this rare first-generation Longines chronograph is powered by the in-house Cal. 13.33 and features a pulsation dial in a 14K yellow gold case.
Predating the legendary Cal. 13ZN, introduced in 1936, the Cal. 13.33 is an early in-house Longines chronograph movement. Time-setting requires a distinctive procedure known as dabopushi: the crown must be turned while pressing a button on the side of the case, an operating method commonly found on antique pocket watches.
The movement showcases an exceptional level of craftsmanship that surpasses many contemporaneous examples from other manufacturers, with beautifully beveled components, elegant curves, and an impressively large jewel setting.
The solid 14K yellow gold hinged case features a double back, with even the inner cover crafted in 14K gold. Matching serial numbers are engraved on both the inner and outer covers, corresponding to the movement. The inner cover also bears engravings indicating the watch’s dual function as a calculating instrument, as well as commemorative markings for 12 awards received at international watch exhibitions. These details capture the distinctive character of vintage Longines, a manufacture renowned worldwide for its technical achievements and exceptional craftsmanship.
The rare pulsation dial further enhances the desirability and scarcity of this remarkable timepiece.
This watch was entered in the “Longines Vintage Watch Contest” held in Japan by Longines in 2010. It is accompanied by a certificate confirming that it ranked 78th among the 486 entries submitted nationwide.