The F.P. Journe F.P.Journe SouveraineBlack Label Centigraphe Souverain 40mm Platinum Black Label Series RARE (Ref. F.P. Journe Black Label Centigraphe Souverain Ref. CT) 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 Alligator skin strap/bracelet. On the secondary market across 1 active listing. 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.