F.P. Journe Octa Lune Ref. L Calibre 1300

The F.P.Journe Octa Lune Ref. L is a refined and poetic timepiece that was produced between 2004 and 2015, powered by the in-house Calibre 1300. The watch is offered in a platinum or 18K 6N gold case measuring 38 or 40mm in diameter, with a guilloché silver dial, 18K gold subdial rings, and blued steel hands. The dial arrangement is characteristically F.P.Journe, with off-centre hours and minutes, small seconds at 4:30, a large date display, a power reserve indicator at 7:30, and of course the moon phase complication — all rendered with meticulous attention to craft and legibility.

The moon phase itself is the heart of the watch's identity. The 18-carat moon and stars set against a blue background are crafted with particular care, making a perfect visual complement to the blued hands. The Calibre 1300 beneath the dial is equally impressive mechanically, featuring bidirectional automatic winding, instantaneous date change, and a remarkable power reserve of approximately 160 hours — a figure that reflects François-Paul Journe's ambition to push the boundaries of precision and autonomy within the confined volume of a wristwatch movement. The movement comprises 223 components and is finished to the highest grade, with circular-striped bridges, polished screw heads, and straight-grained steelwork throughout.