Detail
| Model | Grand Seiko 44GS 4420-9990 |
| Product number | 4420-9990 |
| Year of manufacture | 1967 |
| Movement | Manual winding (Cal.4420B) |
| Country of manufacture | Japan |
| Waterproof | non-waterproof |
| Case diameter | 36mm |
| Material | Stainless steel |
| Crystal material | plastic |
| Strap width | 18mm |
| Buckle width | 15mm |
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[SEIKO] Grand Seiko 44GS 4420-9990