[PATEK PHILIPPE Watches] ZF elegant work 2.316 L Steel Case With a wide curved bezel design 3. Disk surface: iconic gray and blue elements paired with delicate round satin polishing Using ZF's third-generation 324S customized all-in-one movement Simulation degree and travel time are both correct Grey-blue calfskin strap White Stitch Trim With PP classic pin buckle Design and disk color complement each other ZF produces the strongest steel watch on the surface