Tonneau shaped form movement handwound watch.
Originally published in the Chief Editor’s personal blog as a photograph introduction, now reproduced for reference: presenting the movement in the Parmigiani Ionica and Hebdomadaire.
Parmigiani PF 110
The in-house caliber PF110 was developed by Michel Parmigiani, and features a 8 day handwound movement in a tonneau form shape. First used in the Ionica, and later in the Kalpa Hebdomadaire.