 It is believed that there were unexpected trademark issues connected with the name "Submariner" at the time the 6204 and 6205 were released, accounting for the inconsistent use of the Submariner mark on these early Submariners.Trademark irregularities notwithstanding, both the 6204 and 6205 are designated Submariner models in Rolex product literature.In 1954, Rolex also produced a small number of ref.