F.P. Journe Octa Lune Ref. L Octa Platinum Grey Dial

Platinum over a white gold dial plate is the version most people picture when the Octa Lune comes up, and the one that reads coldest of all on the wrist. Everything on the face is a shade of white or silver except the blued hands, which is exactly why the moon window carries as much weight as it does. The model ran through the whole first Octa decade before the cases grew and the reference changed.

Platinum at 38 or 40 mm and 10.6 mm deep, which was the standard Octa footprint of the day. A white gold plate carries the whole dial, with the whitened guilloché silver disc for the hours and minutes screwed onto it and pushed to the right. Small seconds sit under that disc, the date opens across the top of the face, and the moon shows in its sideways crescent low on the left.