F.P. Journe Quantième Perpétuel Ref. QP Octa Platinum Grey Dial

Journe put his perpetual calendar into four windows instead of subdials, which is why the QP reads at a glance where most perpetuals do not. Day and month sit together at the top of the dial, the date fills two windows at the bottom, and a central hand counts the leap year. This is the first generation, launched in 2013 on the Octa base, before the dial was redrawn. On a matching platinum bracelet it is scarcer again.

Platinum at either 40 or 42 mm, on a bracelet cut from the same metal. The dial plate is white gold with whitened silver behind the apertures, and a thin steel ring circles the middle, a detail Journe dropped when he revised the model in 2020. Everything on the calendar jumps at once at midnight rather than creeping, so the windows are either right or briefly in motion, never half way.