Patek Philippe held back this wonder at BaselWorld this year but word of this development from their Advanced Research department has already got hearts aflutter among collectors and enthusiasts.

Like the previous references in this range, Ref. 5250 and Ref. 5350, this model features the latest chapter in Patek Philippe’s silicium adventure, which started in 2001. Patek Philipe has been experimenting with new materials to enhance accuracy and precision, while simultaneously prolonging the lifespan of mechanical components and reducing service intervals.

With the latest reference, the three most important components of the escapement – the hairspring, the balance wheel and the anchor – are now in silicium. To be more precise, the anchor or pallet fork is now in Silinvar®, as the Geneva brand calls it.

Created through the ultra-modern DRIE (Deep Reactive Ion Etching) process, watches bearing the new Silinvar® components represent the nouvelle vague of watchmaking. As a matter of fact, DRIE is not a part of watchmaking at all, traditionally, but offers near infinite possibilities.

As you can see from the pictures, Ref. 5450 is an annual calendar, with moon phase and power reserve indicators. The watch will be available in a very limited edition, in platinum only.