Skip to main content


By May 26, 2022October 14th, 2022Glossary - Rolex


A monobloc bezel or monobloc bezel insert, developed and patented by Rolex. Cerachrom is made of extremely hard, virtually scratchproof ceramics that use zirconia or alumina as a base material, featuring colours that are unaffected by ultraviolet rays. In addition, thanks to its chemical composition, the high-tech ceramic is inert and cannot corrode. For optimum legibility, the moulded graduations, inscriptions and numerals are coated with a thin layer of gold or platinum via Physical Vapour Deposition.


Luminescent display emitting a blue glow in dark conditions. Rolex’s watch hands, hour markers and other elements of the display are coated or filled with Chromalight, a high-performance luminescent material that is exclusive to the brand. Chromalight’s intensity and luminosity duration far outperform watchmaking standards.


Optimised Swiss lever escapement developed and patented by Rolex. The Chronergy escapement is developed based on extensive research that led to a new design for the pallet fork and escape wheel. Both redesigned components are manufactured from nickel-phosphorus, an alloy that renders them resistant to magnetic fields. Their innovative geometry offers the Chronergy escapement a 15 per cent improvement in energy efficiency compared to regular Swiss lever escapements, the standard in mechanical watches.


Concealed folding clasp designed and patented by Rolex, opened using a lever in the shape of a Rolex crown.

Cyclops Lens

The Cyclops lens, a name derived from the one-eyed giants in Greek mythology, was patented by Rolex in the early 1950s. Since 1953, it has magnified the date display in the aperture of many watches in the Oyster Perpetual collection for greatly enhanced legibility.