This is a vintage swiss made Wittnauer mens watch. Written on the watch is 10K GF bezel, steel back, L & K. Written on the end of the band is stainless steel botton caps. Also written on the band is 1/30 GF RGP top, and 1/50 GF RGP end. Each link of the watch has Speidel U. S. A. This is a mechanical watch that you have to wind up. It is in good running condition.