ZENITH Cal. 120-T Observatory (Special 17J)

ZENITH cal. 120-T in heavy gold plated case (with long lugs). It’s from a small production run that was equipped with 17 jewels (normally 18 jewels). The movement features the famous seconds-stop mechanism, which means that the watch stops running when the crown is pulled out. The cal. 120-T differs from the 120 by the steel movement, other than brass. It also has a fine regulation mechanism on the balance. Cal. 120-T was produced in a batch of 18.000 between 1961 and 1963. The movement is, like the Cal. 135, engineered by Ephrem Jobin.
The watch has been recently serviced by us and runs perfectly.