| Model | Grand Seiko 45GS |
| Reference | ¥4,520 – ¥8,000 |
| Year of Production | March 1970 |
| Movement | Manual winding (Cal.4520A) |
| Country of Origin | Switzerland |
| Water Resistance | Daily life waterproof |
| Case Diameter | 35mm |
| Case Material | Stainless steel |
| Crystal | plastic |
| Lug Width | 18mm |
| Buckle Width | 15mm |