Zenith caliber El Primero 4805 SK

Skeletonized version of caliber 4805. Caliber 4805 features a tourbillon and a power reserve indicator. The movement has a power reserve of at least 50 hours. The chain is made of 575 components, while the movement as a whole has 807 parts. Hours and minutes in the center Tourbillon: - The carriage is positioned at 6 o'clock - The carriage makes one turn per minute Power-reserve indication between 4 and 5 o'clock Fusée-chain transmission connected to the barrel