The Seiko SKX521 is a mechanical automatic watch with movement-case reference 7S26-0240. It houses the 7S26 caliber with 21 jewels, running at 21600 bph with an accuracy of +45/-35 seconds per day. It has a 41 hours power reserve, no hand-winding and no stop seconds hand function.
![Watch](https://www.theseikoguy.com/media/watches/skx/SKX521.jpg)
Ref. | SKX521 Depending on the region, bracelet model and other features you may find this watch reference written as SKX521J, SKX521J1, SKX521J2, SKX521K, SKX521K1, SKX521K2, SKX521P, SKX521P1, SKX521P2, etc. |
Case-movement ref. | 7S26-0240 |
Case-Dial code | 024-171 |
Caliber | 7S26 |
Type | mechanical automatic |
Jewels | 21 |
Power reserve | 41 hours |
Hand-winding | no |
Stop seconds hand | no |
Crystal | hardlex |
Strap/Bracelet ref. | 48E0JZ |
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Case reference: 7S26-0240
Case-Dial code: 024-171
Type: Mechanical Automatic
Movement: 7S26
Jewels: 21
Power reserve: 41 hours