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Parmigiani Bugatti 390 Coaxial

Reference PFH3901201401HA144
Brand Parmigiani Fleurier
Watch movement Automatic
Functions Power reserve indicator, Tourbillon
Material White gold
Case shape Rectangular
Crystal Sapphire
Color Watch Dial Skeleton
Dial Markers Index
Strap Buckle Folding clasp
Water resistance 30m
Warranty Two Years International
Watch strap Leather
Availability Contact for availability
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Parmigiani Bugatti Coaxial Type 390

This timepiece is truly one-of-a-kind; its exceptional performance and on-board technology is designed to emulate the Bugatti Chiron in watch form. A hub of innovations and brand new solutions, this engine block on the wrist is unique in its horizontal cylindrical construction. On the one hand, we have the 8-litre 1500-hp quad-turbocharged W16 engine propelling the sports car to a top speed of 420 km/h (limited for road use); on the other hand, we have the Calibre PF390 with its cylindrical "engine" and two series-mounted barrels – a nod to the saddle tank on the Bugatti – and featuring a flying tourbillon boasting an 80-hour power reserve. This new type of "engine" has been slimmed down so that its diameter is no larger than the regulator of its 60-second tourbillon, which shows the seconds. Once the diameter of the regulator was determined according to the inertia required (the balance has an inertia of 10 mg.cm2), the entire construction (including the barrels which power the "engine") fit this measurement to form a regular cylinder. Key to this is the patent which was filed by the Parmigiani Fleurier manufacture when this unique hand-wound mechanical movement was being developed.

Its modular construction, which enables the movement to be removed from its housing – as an engine would be removed for important modifications – involves many ground-breaking solutions. In fact, this calibre PF390 stands out thanks to its gear trains and their arrangement. The objective is the same as on all watches: namely to transmit the energy from the barrels to the escapement. But in view of the cylindrical configuration of the movement, the usual alternating wheel-pinion-wheel-pinion configuration is replaced by a transmission using three planetary gear trains. Each of these three planetary gear trains is equipped with a central train wheel, three planetary gears and a metallised fixed ring gear. A new type of component, this planetary gear train has never before been used in watchmaking gear trains

This brand new planetary gear train uses the smallest ball bearing in the world: just 1.28 mm in diameter for 12 ceramic balls measuring 0.2 mm in diameter. The ball bearings used on the Bugatti Chiron may be very different in terms of size, but they are very similar in terms of technology! Each of the three planetary gear trains features three bearings, making a total of nine ball bearings in all. Another key point is the fact that the assembly requires no lubrication: a significant advantage in terms of reliability and maintenance.

Moreover, the manufacturers have designed a rod clamp - by replacing four common components on an ordinary watch movement (setting lever, setting lever jumper, yoke and yoke spring on the winding mechanism) – to perform the dual function of winding the two barrels and setting the time. This optimised development helps boost the performance of the mechanism. Using a single component instead of four makes it simpler and more reliable, thereby reducing maintenance. Exactly what we look for in any technological advance. This rod clamp mechanism is used to wind the two connected barrels (energy reservoirs), which are series-mounted coaxially.

Inspired by the fluid curves of the Bugatti Chiron, the case is also created from gold, (white gold or rose gold, depending on the version), and engraved on the back with the inscription "EDITION LIMITEE 10 PIECES" (10-piece limited edition). This case was created by Les Artisans Boîtiers – one of Parmigiani Fleurier's manufacture divisions; constructed around the cylindrical structure and water resistant to 3 ATM, it stands out thanks to its ability to pivot 12° around its drive shaft (patent pending), to ensure perfect ergonomics around any wrist. The remarkable technical sophistication of the timepiece can be admired via the large openings topped with sapphire crystal, which is extremely complex to create. Via the top and the end of the tubular structure, the sapphire crystal thus invites us to dive deep into the heart of the timepiece's incredibly complex mechanisms (the "engine" and flying tourbillon), while the openings over and under the dial reveal the watch's many gears and enable the time to be read. The alligator leather strap is signed by Hermès and is fitted with a gold folding buckle.

Reference PFH390-1201401-HA144

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