In 1999, IWC released the Da Vinci Tourbillon. It featured a hand-wound movement with a tourbillon escapement and kept the same size as the original 1985 model. The watch came in yellow gold (limited to 200 pieces) or platinum (limited to 50 pieces). There was also a special edition 'Four Seasons' model with an engraved dial (limited to 20 pieces) and a 'Leonardo' model in yellow, rose, and white gold (limited to 50 pieces each). The dial could be marked in German, Italian, English, or French. The Da Vinci Tourbillon reference IW3752-19, part of the Leonardo series, was created to honor the