Greubel Forsey Technique 30 Degree Double

Technique 30 Degree Double, a black PVD manual wind wristwatch with tourbillon Description Greubel Forsey's Double Tourbillon 30° is designed in black ADLC treated titanium and is a lighter-weight version of the watch. It features two tourbillon cages, one rotating every four minutes with an interior cage containing the balance wheel and spring. The smaller tourbillon completes its revolution once per minute. Both rotational speeds combined improve timekeeping by averaging out positional errors due to gravity. Condition Report Revive Fair Good Very Good Like New The watch is in excellent, like-new condition. The movement is running at the time of cataloging, however, it was not tested for the accuracy of time or duration of the power reserve and may need service at the buyer's discretion. Please note that Sotheby's does not guarantee the future working of the movement. Complication Tourbillon Gender Men's Dial Color(s) Skeletonized Movement Type Manual Wind Case Size (mm) 47.5 Case Back Secured by screws, Sapphire display-back Band Material Leather Clasp Type Deployant buckle Signature Dial, Case Papers Yes SKU CMBQ8 Conditions of Business Please note that the cancellation right for EU/UK purchasers applies to this item. Please read Condition 19 of the Buy Now Marketplace Conditions of Business for buyers for more information. Read more here .