A rugged all steel Zenith diver, ca 1970, certified for 300m! The lume on the hands and brown/green dial has aged beautifully. This watch is fully serviced and ready for many years use. Serial 575D997. Caliber 2562PC. 23 jewels. “Patent Pending 1808 -68.” This is in our opinion the best looking Defy model. It will both last and increase in value!