ArtyA Purity Tourbillon
The movement architecture of ArtyA's latest tourbillon is aesthetically well-balanced. With respect to the balance itself, I applaud the use of a free-sprung balance wheel—any tourbillon without a free-sprung balance, isn't taking itself seriously. I do have some concern about the one-to-one ratio of the gear train delivering power to the tourbillon itself, though.
Image credit ArtyA