The Grand Seiko 4520-8010 (ref. 45GS 030) is a Hi-Beat manual wind watch of the 45GS family. There is only one version of this reference, with an 18k yellow gold case and a white dial.
The first appearance in the official Seiko catalogs is in the second volume of 1969, while the last appearance is in the second volume of 1971.
There is a date version of this watch, with reference 4522-8010 (45GSC 030).
18k Gold
| Ref. | 45GS 030 |
| Case-movement ref. | 4520-8010 |
| Year | 1970 |
| Caliber | 4520A |
| Jewels | 25 |
| Bph | 36,000 |
| Type | Hi-Beat Manual Wind |
| Family | 45GS |
| Branch | Daini Seikosha |
| Material | 18k Gold |
| Crystal | Acrylic |
| Size | Diameter: 36 mm Lug width: 18 mm |
| Complications | – |
| Hacking | Yes |
| Dial code | JAPAN 4520-8010T |
| Technical info | Japanese |
| Catalogs | 1970 vol. 1 1970 vol. 2 1971 vol. 1 1971 vol. 2 1972 1973 vol. 1 |