
Classic Black Seiko 5: 7S26 21 Jewels, 37mm, Exhibition Caseback
Collection
The Seiko SNKE01K1 belongs to the Seiko 5 range, one of the most iconic lines in Japanese watchmaking. Launched in 1963, this collection embodies accessible automatic watches: 37mm case, 21-jewel 7S26 caliber, 30m water resistance. Note: the 7S26 does not feature hacking or manual winding — an intentional characteristic of this entry-level caliber.
Case
The case of the Seiko SNKE01K1 is made of stainless steel, with a diameter of 37 mm and a thickness of 11 mm. The bezel is fixed. The black dial is protected by Hardlex glass, a proprietary Seiko treatment for light scratches. The caseback is exhibition (transparent), allowing observation of the movement in operation. Water resistance is 30 m, suitable for splashes and rain.
Movement
The Seiko SNKE01K1 is powered by the 7S26 automatic caliber, offering a power reserve of approximately 41 hours. This movement has neither hacking (stop-seconds for setting the time) nor manual winding — two functions intentionally absent from this entry-level caliber. Its accuracy oscillates around ±15 seconds per day, which is expected for an automatic movement in this segment.
Strap
The Seiko SNKE01K1 is fitted with a stainless steel bracelet, which is both robust and easy to maintain, fastened by a folding clasp, which makes it easy to put on and take off the watch while securing the bracelet to the wrist. The lug width is 18 mm.
Specifics
Housing
Dial
Bracelet
Other features
Supplied with: Storage box, presentation pad, user manual.
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2-year international warranty