Zenith El Primero 410 El Primero 410, 18.2091.410/01.C494, 2015 (Approximation), 42 mm, Silver

The Zenith El Primero 410 (Ref. 18.2091.410/01.C494) is a sophisticated men’s timepiece that combines Zenith’s legendary chronograph with a full calendar and moon phase complication. Powered by the high-frequency El Primero Caliber 410, which beats 10 times per second and is made up of 390 components, this watch offers remarkable accuracy and mechanical beauty, visible through its see-through case back. The 42mm rose gold case adds elegance, while the silver dial features displays for the day, date, month, and moon phase. Although it shows signs of wear—such as dents on the case and some peeling near the 55-minute marker—the watch has been carefully maintained and externally finished. It is paired with a replacement Cassis alligator strap, adding comfort and style. Originally sold in January 2015 as a parallel product, this model remains a technically impressive and visually refined choice for lovers of classic complications.