Grand Seiko
Grand Seiko Grand Seiko 45GS 4520-8000 4520
The Grand Seiko Grand Seiko 45GS 4520-8000 (reference 4520) is a watch. It runs on the manual caliber 4520. It was made from 1968 to 1970.
Specifications
Case
- Reference
- 4520
- Collection
- 45GS
Movement
- Movement
- Manual
- Caliber
- 4520
- Frequency
- 36,000 vph
Production
- Production
- 1968–1970
Dial versions
This reference was made with these dials and finishes.
4520
4520-8000
How it compares within the 45GS family
Side by side with other references in the same collection, from the catalog.
| Reference | Size | Material | Dial | Caliber | Years |
|---|---|---|---|---|---|
| 4520 (This watch) | — | — | — | 4520 | 1968–1970 |
| 4522 | — | — | — | 4522 | — |
About the 45GS family
The 45GS arrived in 1968 as a hand-wound high-beat Grand Seiko running at 36,000 vibrations per hour. Caliber 4520 shows the time only, while caliber 4522 adds a date.
The 45GS shares the flat surfaces and sharp facets of the Grand Seiko Style. Collectors look for crisp case lines, an original dial and hands, and a movement serviced by someone who knows high-beat Seiko calibers.
Quick answers
- What movement does the Grand Seiko Grand Seiko 45GS 4520-8000 4520 use?
- It uses the manual caliber 4520.
- Is the Grand Seiko Grand Seiko 45GS 4520-8000 4520 still in production?
- No. It was made until 1970.
- When did the Grand Seiko Grand Seiko 45GS 4520-8000 4520 come out?
- It was introduced in 1968 and made until 1970.
Catalog facts checked October 2026.