The Greubel Forsey Double Tourbillon 30°Asymetrique in Rose Gold on Black Alligator Leather Strap with Black Dial Limited to 11 (Ref. 30), introduced in 2016, is a Rose gold-cased luxury mechanical wristwatch. The case measures 43.5 mm. 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.