Seiko 5 Men's Automatic Watch SNK621K1 Gray Blue

Classic Grey Seiko 5: 7S26 21 Jewels, 37mm, Exhibition Case Back

Collection

The Seiko SNK621K1 is part of the Seiko 5 range, one of the most iconic lines in Japanese watchmaking. Launched in 1963, this collection embodies accessible automatics: 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 SNK621K1 is made of stainless steel, with a diameter of 37mm and a thickness of 11mm. The bezel is fixed. The grey dial is protected by a Hardlex crystal, a proprietary Seiko treatment for light scratches. The case back is exhibition (transparent), allowing observation of the movement in operation. Its water resistance is 30m, suitable for splashes and rain.

Movement

The Seiko SNK621K1 is powered by the automatic caliber 7S26, offering a power reserve of approximately 41 hours. This movement does not feature hacking (stopping the second hand for time setting) or manual winding — two functions intentionally absent on this entry-level caliber. Its accuracy oscillates around ±15 seconds per day, which is expected for an automatic movement in this segment.

Bracelet

The Seiko SNK621K1 is equipped with a stainless steel bracelet, both robust and easy to maintain, secured by a deployant clasp, which makes it easy to put on and take off the watch while securing the bracelet to the wrist. The lug width is 18mm.

Supplied with: Storage box, presentation pad, user manual.