Offered here is a mint and Croton Chronomaster Aviator Seadiver chronograph, circa 1960s. This chronograph was produced by a few different brands (e.g., Nivada Grenchen), and used a variety of different movements. This example is powered by the Valjoux 23, the most desirable of the many variants. The case is unpolished and razor sharp, with original beveled edges present. The dial is perfect, with no flaws; the original crystal has some spots, and can be replaced upon request. The original tritium lume is present in both hands and dial, aged to a yellow color on the dial, and a darker yellow/green in the hands.