At the SIHH 2016, Audemars Piguet presented another rendition of its Royal Oak Openworked, and this time, it included a Double Balance Wheel… Why supplant this sublime model? Furthermore, why have two balances? We all realize that pictures are superior to words to see, so let’s surrender the floor to the CEO of Audemars Piguet, François-Henry Bennahmias (and you’ll see, there’s a great story behind the formation of this watch) and Gilles Pellet, Head of Product Quality Department at Audemars Piguet, to find the amazing and actually advanced Audemars Piguet Royal Oak Double Balance Wheel Openworked 15407.
One of the boldest models in the Royal Oak assortment, close by the classical 15400 and the super meager 15202, has consistently been the Openworked Selfwinding adaptation 15305 – so-to-say, a connoisseur’s watch, made for the gatherers who care about watchmaking and who realize how to perceive a genuine Haute-Horlogerie execution and design. This watch, in a 39mm case, includes an advancement of the notable type 3120, in a completely skeletonized rendition, completed in a brilliant way: anglages executed by hand, various inward and external angles… Yet, in 2016, Audemars Piguet concluded that this watch ought to be refreshed, by presenting the new Royal Oak Double Balance Wheel Openworked reference 15407. For what reason would they do that?
First of all, this new Openworked form refreshes its case to a 41mm measurement, in accordance with the remainder of the “automatique” assortment (understand here the 15400). In any case, that’s not the fundamental development point. What intrigues most is the expansion of a second hairspring to the controlling organ of the type 3120. What could be the upsides of such an element? There are alternate points of view to consider. The first is about visual joy. Having a double balance wheel, one of them being put on the dial side of the watch, permits the wearer to appreciate the view on the managing organ’s expressive dance in any event, when wearing his watch – and furthermore while noticing the movement…
However, the fundamental overhaul concerns the specialized angles, essentially the chronometrie. Setting this double balance wheel gadget on an old style type 3120 permits to appropriately gauge its advantages, in comparison to a conventional “single balance”. The thought was to utilize the benefits of having two balance springs, without the issues that come with them. Having a double spring builds the exactness. Notwithstanding, this development (when you have two hairsprings on a similar side of a solitary balance) is known to be hard to change and makes additional contact on the balance staff. In an escapement with one spring, a blunder happens because of where the spring is connected to the hairspring stud. One answer for settle it was the Breguet terminal bend (which as of now addresses this issue very well). Another impact is the mistake you have in the combination of the actual spring. Taking 2 springs made of a similar compound and set them 180° separated drops this completely, which benefits the generally chronometric execution of the watch.
The thought of having not a double hairspring but rather a double balance, which means a development with a balance staff carrying one balance and one hairspring on each side, is to permit to direct the watch from each side of the development. Since there are two variable idleness balances set oppositely (each of them being changed by 8 inactivity blocks/masselottes), it implies that the weight is totally appropriated around the balance staff and that watchmakers can amazingly finely tune the watch, altogether positions. Likewise, in light of the fact that the weight is equivalent on the two sides of the balance staff, it implies that grindings are decreased and furthermore better circulated – explaining the benefit of a double-balance compared to a double hairspring on a solitary balance.
Finally, there’s the vibe of this movement… With these wonderful embellishments and the pink-gold hued connect, which differentiates in this anthracite environment. The whole type 3132 is opened and completely hand completed, with various inward and external points that we know must be the result of the human hand and of long periods of careful work.
More subtleties can be found on this watch on www.audemarspiguet.com .