The Girard-Perregaux Girard Perregaux GP 70007000 GBM (Ref. 7000 GBM) is a Gold/Steel-cased luxury mechanical wristwatch. The dial is Brown. Powered by a Automatic movement. It wears on a Leather strap/bracelet. On the secondary market, the Girard Perregaux GP 70007000 GBM averages $19,502,320 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.