Grand Seiko 45GS 4520-8010
Precision, given texture
The 4520-8010 took hold of my imagination the first time I handled one. Its bezel-free 18k gold case carries an intricate hatched texture across a shape that seems simple until you try to follow every change of surface. The geometry and the texture make each other more compelling.
The dial is just as carefully held together. Consistent widths of black on the hands and markers establish a solemn coherence within the gold. The result feels both extravagant and completely controlled. My own example is from September 1970; it continues to reveal more than its first impression suggests.
The watch
| Reference | 4520-8010 |
|---|---|
| My example | September 1970 |
| Manufacture | Daini Seikosha |
| Movement | 4520A · manual wind |
| Beat rate | 36,000 vibrations/hour · 5 Hz |
| Functions | Hours, minutes, central seconds |
| Case | 18k gold; bezel-free textured case |
| Dial | Light dial with gold furniture and black accents |
| Case width, without crown | 36.0 mm |
| Thickness, including crystal | 9.0 mm |
Dimensions measured on this example.
Two very different golds
My first side-by-side encounter put a friend’s 4520-8010 next to my Suwa-built 5641-5000. Both are 18k gold, yet the atmosphere was quite different. The 56 appeared noticeably darker; the Daini watch had a brighter presence.
It was a useful reminder of how much remains to be seen after the material has been named. Texture, case shape and the way the dial is articulated make each watch its own composition.
