Explaining What’s New with the Revamped Tudor Heritage Black Bay Tudor by wholesalewatches - March 3, 20180 Tudor began producing their own calibers in house (also, it must be noted, independent from older sister manufacturer Rolex) in 2015, originally providing them in their own North Flag game watch and in Pelagos diver's watches. Ever since that time, we've seen the continuous introduction of manufacture calibers during