Tourbillon Double Spiral, Besançon Certified, White Gold 17000 They are rumored to have

They are rumored to have been the inspiration for John Mayer’s recent collaboration with Audemars Piguet

and distinct Genta designs today

the Tourbillon is regarded as emblematic of the very best of Parmigiani Fleurier's early efforts

hand engraved balance

Tourbillon Double Spiral, Besançon Certified, White Gold 17000 They are rumored to haveA Tourbillon Double Spiral, the first model ever released from Laurent Ferrier in 2010. This is one of very few examples made in a 39mm white gold case, as opposed to the standard 41mm, also submitted for Besanon Certification at request of client. Calibre FBN 916. 01 uses dual Straumann Hairspring, with two spirals mounted directly out of phase to cancel positional errors. Its architecture is inspired by mid century Patek Philippe observatory