Most of the models from this time were produced in replica watches yellow gold, although they did produce some in rose gold for the South American market. Rolex made the radical replica watches decision to release this watch in steel in the late 1950's, and the watch took off. In fact, to Rolex's surprise, the steel versions started to far outsell the gold models so much, that they decided replica watches sale to release the "two-tone" version in 1962 to fill in the marketing gap. And the rest is history. The Rolex "two-tone" Datejust replica watches became the quintessential Rolex watch. However, to Rolex's chagrin... this watch also became the most copied watch in the world, everyone made a Rolex "two-tone" Datejust: Seiko, Benrus, Invicta, Bulova, replica watches Citizen, etc., etc... If everyone made this watch, why didn't Rolex evolve the design to stay ahead of the pack, as the car manufacturers did?