The Oyster Perpetual Girl-Datejust is an icon on the earth of watches. It was launched in 1957, at a time the place girls had been altering — they had been having fun with new, energetic life. They discovered a brand new sense of autonomy, and needed to manage their very own destinies and handle their time extra exactly. Hans Wilsdorf, founding father of Rolex, understood what the fashionable lady needed, and so was born the Girl-Datejust.
Pioneering girls have all the time been a keystone within the historical past of Rolex. Because the earliest days of the model, they’ve impressed the creation and improvement of particular timepieces that might help their quest for empowerment. The Girl-Datejust is a celebration of those that dare to paved the way. It embodies precision whereas combining traditional magnificence and technical efficiency.
Designed for the slender wrists of girls, the Girl-Datejust contains a 28 mm Oyster case, assured waterproof to a depth of 100 metres (330 toes), and crafted from Oystersteel or 18 ct gold. Its sapphire crystal is just about scratchproof, with a Cyclops lens at 3 o’clock over the date. A number of dial variations can be found, in a wealth of supplies, colors, markers and motifs, offering the discerning lady with choices to customize her watch and make her assertion.
Landmark in Watchmaking
Hans Wilsdorf as soon as said of his enduring mission: “Girls need the most effective of each worlds: a tiny watch and an correct motion. But, the smaller the watch, the tougher it’s to make it correct.”
That is exactly why the Girl-Datejust was ‘impressed by audacity’, because it was a serious technical problem to supply such small exact actions within the twentieth century. Since its inception, Rolex has made numerous enhancements to the guts of the Girl-Datejust. Presently, it’s geared up with calibre 2236, a self-winding mechanical motion totally developed and manufactured by Rolex.
Launched in 2014 calibre 2236 is a self-winding mechanical motion totally developed and manufactured by Rolex, providing excellent efficiency by way of precision, energy reserve, resistance to shocks and magnetic fields, comfort and reliability. A consummate demonstration of know-how, this motion carries plenty of patents. Let’s delve deeper into this motion which is on the forefront of watchmaking know-how.
The guts of the Girl-Datejust
These with a ardour for watches know that in mechanical watches, the oscillator is the ‘guardian of time’, sustaining the precision of the watch by way of the interactions of the steadiness wheel and the hairspring.
The oscillator of calibre 2236 has a steadiness wheel with variable inertia regulated extraordinarily exactly by way of gold Microstella nuts, held firmly in place by a height-adjustable traversing bridge enabling very steady positioning to extend shock resistance. The oscillator can also be fitted on high-performance Paraflex shock absorbers, designed and patented by Rolex.
The hairspring of a motion is a fragile element that’s topic to environmental disturbances that may adversely have an effect on the oscillator’s efficiency. Magnetic fields, temperature variances and shocks all serve to throw the oscillator off.
To offer higher stability within the face of those disturbances, Rolex developed the brand new Syloxi hairspring, including a second distinct paramagnetic steadiness spring know-how to finish its vary of high-performing hairsprings, alongside the blue Parachrom hairspring.
The Syloxi hairspring is totally manufactured in-house by Rolex from a silicon and silicon oxide composite, a mix of supplies whose thermo-compensating and paramagnetic properties enable the hairspring to keep up its excessive precision when subjected to temperature fluctuations and magnetic interference.
Utilising deep reactive ion etching know-how (DRIE), the hairspring is crafted with a patented geometry that optimises its isochronism and thus the regularity of the oscillations of the steadiness wheel-hairspring meeting. The variable pitch and thickness of the coils, optimised alongside the entire size of the hairspring, ensures fixed improvement in all positions, compensating for the results of gravity.
Inspecting the Syloxi would present a hairspring fastened to the steadiness employees and bridge utilizing a patented versatile collet, eliminating the necessity for glue and conserving the hairspring’s internal finish completely perpendicular, flat and self-centring.
Trying alongside the hairspring, one can see that the Syloxi terminates in a extra inflexible, bolstered crescent-shaped half that permits a two-point fixation to the traversing steadiness bridge, making certain that the hairspring is completely centred, completely flat and freed from any residual mechanical stress in its energetic zone.
Fixing it this fashion allowed Rolex to optimise the beat adjustment utilizing a Paraflex shock absorber that contains a fluting for this objective, which can also be the signature of Syloxi-equipped calibres.
This marvel of precision engineering offers the Syloxi with nice stability within the face of temperature variations; as much as 10 instances extra precision than a standard hairspring in case of shocks; and better resistance to magnetic fields.
Additionally of curiosity is that the calibre 2236 is provided with a paramagnetic nickel-phosphorus escape wheel enhancing its resistance to magnetic fields.
Like all Rolex watches, the Girl-Datejust is roofed by the Superlative Chronometer certification redefined by Rolex in 2015. The precision of a Rolex Superlative Chronometer is of the order of −2/+2 seconds per day — the speed deviation tolerated by the model for a completed watch is considerably smaller than that accepted by COSC for official certification of the motion alone.
Every calibre 2236 is fitted with a self-winding module by way of a Perpetual rotor, which ensures steady winding of the mainspring by harnessing the actions of the wrist to supply fixed vitality. This gives an influence reserve of roughly 55 hours.
As with all Rolex actions, calibre 2236 is made in-house by Rolex, together with all elements.
A timepiece that encapsulates Rolex values, the emblematic Girl-Datejust has been a byword for fashion and technical efficiency ever since its launch, celebrating those that dare to paved the way.
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