Tudor Unveils One Of A Kind Heritage Black Bay One For Only Watch 2015 Tudor by wholesalewatches - March 3, 20180 Tudor began producing their very own calibers in home (and, it must be said, independent from older sister manufacturer Rolex) from 2015, initially supplying them in their own North Flag game watch and in Pelagos diver's watches. Since then, we have seen the steady introduction of fabrication calibers throughout