Only diamonds that are at least IF in clarity are used and only coloured diamonds that are between D and G selected for Rolex watches. Each diamond is individually chosen and set for a particular watch. Many of Rolex's most exclusive watches have their own custom settings, which means no two exclusive watches are the same.

Rolex's in house team of jewellers and gemologists select, purchase, test, arrange and then set each diamond in each Rolex model. Every single rock used in a Rolex has been hand-cut. No wonder it takes approximately a whole year to make one Rolex timepiece.

The first diamond bezels were made in white gold, paired with a yellow gold case. The 1804 model from the 1800 series is the only model in this prestigious series to have the diamond bezel installed at the Rolex factory - making it the most covered piece from the 1800 series.

Each Rolex watch that features diamonds will usually have between 44 to 50 stones set in it.

In the 1920s, Rolex set the bar for jewellery watches, that was later only trumped by one of their creations. The Exceptionally Beautiful Diamond pieces were hand wound and had a Silk Moiré strap. These rare pieces epitomise the sumptuous glamour and craftsmanship of the Deco Period.

In 1992, the launch of the Pearlmaster, a new version of the Rolex Lady-Datejust, set the world of watch-collecting on fire. It is often described as Rolex’s ''crowning jewellery watch.'' Available in 18ct yellow, white or everose gold and finished with a circle of precious gemstones such as diamonds, sapphires or rubies, the Pearlmaster epitomises the jewellery watch.

All pieces featured will be part of John Pye's auction ending on 5th October, 2017.