The Girard-Perregaux Girard Perregaux 1966Vintage 1966 Full Calendar Moonphase in White Gold on Black Crocodile Leather Strap with Silver Dial (Ref. 49535-53-152-BK6A) is a White gold-cased luxury mechanical wristwatch. The case measures 40 mm. Powered by a Automatic movement. It wears on a Crocodile skin strap/bracelet. On the secondary market, the Girard Perregaux 1966Vintage 1966 Full Calendar Moonphase in White Gold on Black Crocodile Leather Strap with Silver Dial averages $12,100 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.