Day and Night Parity. Stainless case, diameter 39 mm, 12,8 mm height. Cyclos automatic movement CW1 (based on ETA 2892-A2) with Greubel & Forsey input. Sapphire crystal, screwed back and horn-back alligator (ABP Paris) strap with original folding clasp.w/extra new black leather band. These retailed for $9,500 when new and are very individual. A fine and incredibly rare timepiece with Gruebel and Forsey Design.