These will be tourbillon and the escapement.
There's no denying that the tourbillon and fusée-and-chain escapement have become obsolete. Having those mechanisms both means the Zenith Defy Fusee Tourbillon is a marvel. Truth be told, the broadcasts are complex to fabricate even in this era.
Meanwhile, its outside is at the other end of the spectrum. Despite the mechanisms that are antiquated inside, it owns the vibes that the collection has. The Defy watches' quirky designs might not be everyone's cup of java. There is not any denying that its moves are some of the very best, if not the best. And if you're a hardcore watch fighter, that is more than enough reason to check out the collection.