The Seiko SKXK77 is a mechanical automatic watch with movement-case reference 7S26-2030. 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.
| Ref. | SKXK77 Depending on the region, bracelet model and other features you may find this watch reference written as SKXK77J, SKXK77J1, SKXK77J2, SKXK77K, SKXK77K1, SKXK77K2, SKXK77P, SKXK77P1, SKXK77P2, etc. |
| Case-movement ref. | 7S26-2030 |
| Case-Dial code | 203-503 |
| Caliber | 7S26 |
| Type | mechanical automatic |
| Jewels | 21 |
| Power reserve | 41 hours |
| Hand-winding | no |
| Stop seconds hand | no |
| Crystal | hardlex |
| Strap/Bracelet ref. | Z1397S |
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SKXK78
Case reference: 7S26-2030
Case-Dial code: 203-503
Type: Mechanical Automatic
Movement: 7S26
Jewels: 21
Power reserve: 41 hours
SKXK79
Case reference: 7S26-2030
Case-Dial code: 203-503
Type: Mechanical Automatic
Movement: 7S26
Jewels: 21
Power reserve: 41 hours