As link early as link 1945, Zenith link developed the caliber 135, which was produced from 1949 to 1962 in two versions: link one for commercial use and the other designed solely for the chronometry competitions that were in vogue in the post-World War II years.
As link early as link 1945, Zenith link developed the caliber 135, which was produced from 1949 to 1962 in two versions: link one for commercial use and the other designed solely for the chronometry competitions that were in vogue in the post-World War II years.