The F.P. Journe F.P.JourneChronometre Optimum Black Label 40 mm F.P. Journe Chronometre Optimum Black Label (Ref. F.P.Journe Chronometre Optimum Black Label - Ref. CO), introduced in 2020, is a Platinum-cased luxury mechanical wristwatch. The case measures 40 mm. The dial is Black. Powered by a Manual winding movement. It wears on a Leather strap/bracelet. On the secondary market across 2 active listings. When buying pre-owned, check condition grade, box and papers (typically a 10–20% premium), service history, and originality of dial and hands. Use the listings and price history on this page to benchmark fair market value.