The Omega Specialties CK 859 draws inspiration from a classic 1939 Omega wristwatch. It equips a modern, manual-winding Co-Axial Master Chronometer Calibre 8926, resistant to magnetic fields up to 15,000 gauss. The 39mm stainless steel case, slightly larger than the original, houses a brown leather strap and features a polished caseback with engravings. The watch maintains a clean, legible dial design with a sector layout echoing the vintage model, featuring a small seconds subdial at 6 o'clock.