| Model | Santos Octagon SM 18K YG x SS Quartz |
| Reference | 187903 |
| Year of Production | 1980s |
| Movement | Quartz (Battery-powered Cal.687) |
| Country of Origin | Switzerland |
| Water Resistance | Daily life water resistance |
| Case Diameter | 25mm |
| Case Material | 18K Yellow Gold x Stainless Steel |
| Crystal | Mineral glass |
| Lug Width | 12mm |
| Buckle Width | 10mm |