Rolex Day-DateThe very essence of luxurious time-keeping, provided with a day and date function. It was launched in 1956 as a niche model and was only produced in precious metals, the retail price was way costlier than previous models. However, due to its popularity among a lot of prestigious people (for example a lot of Presidents, hence its nickname/ bracelet name), it became Rolex’ flagship model.Over the years this model enjoyed associations with various ‘kinds of people’, from celebrities to Mafiosi (like Tony Soprano). They had all one thing in common: being successful in their area of expertise. To this day the Day-date is still synonymous with prestige and style. With exception of the most modern models the Day-Date comes in at 36mm. Do you earn this watch?REF. 18xxThe very first Day-Date references (65xx & 66xx) were replaced by the 18xx series in 1959 and a new era for the Day-Date begins. They 1530 cal. Improved to cal. 1555 or late cal. 1556. The dial colour and configuration varies. Characteristic for this era of production is the so-called ‘Pie-Pan’ dial where the dial looks like an upside-down pie-pan. (a concentric ring that slopes down from the flat centre). The series references do not indicate the material but  the type of bezel or bezel/ case decoration:REF.1803, ‘Fluted’ bezel