Tudor Submariner Snowflake Blue dial ref 9401The Tudor Submariner was introduced in 1954 as reference 7922, together with its big brother, the Rolex Submarineralmost like twin watches! In 1969, Tudor decided to update its Submariner diver with a new face: the shield logo replaced the rose logo, and a new blue color, the now iconic squared handset (commonly known as the snowflake), and an optional date version were introduced, just as its sister brand Rolex offered at the time. The Tudor