PORSCHE DESIGN LIMITED EDITION 911 Mechanical self-winding movement, reference 6023.4.05.001.07.2. Reference: 6023.4.05.001.07.2. Serial number: PD022.860. Case: titanium. Dial: black. Movement: mechanical, self-winding. Strap: leather with a Porsche-branded folding clasp. Crystal: sapphire. Accessories: comes with its box and papers. A titanium gentleman’s wristwatch with a self-winding movement, by Porsche Design.