Rolex DatejustIn 1945 Rolex created the flagship Datejust to mark the company’s 40th anniversary. This model was the world’s first self-winding wristwatch with a date indication. With the Datejust, Rolex also introduced the iconic 5-piece jubilee bracelet, first in solid gold and later in bicolor and stainless steel. On the tenth anniversary of the Datejust in 1955, the magnifying ‘cyclops lens’ was introduced on the Datejust.Reference 16XXXThe Datejust 16xxx (5 digits) is introduced in the late 1970s and recognizable by the flat dial. This ‘newer’ Datejust has an updated calibre 3035 with a Quick Set of the Date.