The Seiko SNKM87 is a mechanical automatic watch with movement-case reference 7S26-03Z0. 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. | SNKM87 Depending on the region, bracelet model and other features you may find this watch reference written as SNKM87J, SNKM87J1, SNKM87J2, SNKM87K, SNKM87K1, SNKM87K2, SNKM87P, SNKM87P1, SNKM87P2, etc. |
| Case-movement ref. | 7S26-03Z0 |
| Case-Dial code | 03Z-11N |
| Caliber | 7S26 |
| Type | mechanical automatic |
| Jewels | 21 |
| Power reserve | 41 hours |
| Hand-winding | no |
| Stop seconds hand | no |
| Crystal | hardlex |
| Strap/Bracelet ref. | M0VD111J0 |
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Case-Dial code: 03Z-11N
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