Zenith, Cal. 146 powered, chronograph, Calatrava bezel, silver dial, 35 mm diameter dial, enver steel, circa late 1930s. It is powered with Cal.146, which is based on Universal's famous Cal.285. It has different finishes from Cal.285, such as C?tes de Gen?ve and beveling. The simple yet elegant design of the silver dial and the dignified Calatrava case made of embossed steel, which is common to Universal watches of the same period.