Seiko SNK355

Seiko 5 Men’s Automatic Watch SNK355 Review SNK355K


Seiko SNK803 Watch Review Summary

My rating: 8/10. Seiko 5 SNK355 watch, also known as the SNK355K. Affordable automatic timepiece.

Hello, today I’m doing a Seiko SNK355 review. It’s another popular SNK timepiece from the Seiko 5 series which aims to offer quality automatic watches for an affordable price that’s accessible to everyone.

I hope you enjoy this Seiko SNK355 review below.

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Seiko SNK355

View detailsLatest reviews, ratings and pricesSeiko SNK355 watch

At the bottom of this article, you can find a list of my recommended retailers to purchase this watch from

Seiko SNK355K Watch Review

Seiko SNK355 Dial & Case Design

I really like the easy to read simple dial design of this model. The hands and hour markers are coated in lume which make them easier to read in dim lit conditions. There’s also a handy day and date display located at the 3 o’clock position on the dial.

The casing is made of a strong stainless steel and features an exhibition glass caseback to let you view the movement of the watch.

Seiko SNK355 Type Of Crystal

The Seiko SNK355 features Seiko’s proprietary Hardlex crystal glass. It’s found on many of Seiko’s watches and is known to be tougher than mineral glass but not quite as strong as sapphire glass. Overall it offers a good level of scratch and knock resistance.

Seiko SNK355 Watch Movement

Powering the timepiece is a Seiko 7S26 automatic movement. This is known as a workhorse movement in the Seiko community and is highly recommended by a lot of people. It’s a 21 jewel movement with a 43 hour power reserve and doesn’t feature manual winding or hacking. The 7S26 beats at 21,600 BPH giving it a nice and smooth 6 ticks per second.

Seiko SNK355 Watch Size

The Seiko SNK355K has that typically smaller casing diameter of 37mm (not including the crown) which is found on quite a few of the Seiko 5 watches. The thickness of this casing comes in at approximately 11mm. This is a medium sized watch by today’s standards.

Seiko SNK355 Strap

The strap of this model is made of a sturdy stainless steel that has a width of 18mm. The strap is replaceable so if you want to swap it out to something more your style then this is always an option. This strap fastens with a standard fold over push release style clasp.

Seiko SNK355K1 Extra Features

A key feature of this watch that I really like is actually hidden to most people. It’s the exhibition style glass caseback that allows you to take a look at the inner workings of the automatic movement through the rear casing of the watch.

Seiko SNK355 Water Resistance Rating

This is an affordable watch that isn’t really designed for water wear and as such has a relatively basic water resistance rating. A 30m or 3 bar rating makes this watch suitable for everyday use. Splash/rain resistant. Not suitable for showering, bathing, swimming, snorkelling, water related work and fishing.

Seiko SNK355 Watch Specifications

  • Band: Stainless steel strap, standard length, 18mm width, fold over style clasp.
  • Case: Stainless steel casing, sizing diameter: 37mm and thickness: 11mm.
  • Dial: Analogue display. Hardlex crystal glass window lens.
  • Movement: Japanese Automatic movement.
  • Water Resistant: A water resistance of up to 30m / 3 bar.

Seiko SNK355 Watch Advantages

  1. Hardlex crystal
  2. Exhibition caseback
  3. Popular 7S26 Japanese automatic movement
  4. High visibility display
  5. Luminous hands
  6. Day and date display

Seiko SNK355 Watch Disadvantages 

  1. The watch has a smaller 37mm build so it may not be suitable for people with larger wrists

My Final Thoughts On This Seiko SNK355 Review:

It’s well worth checking out my 14 Best Seiko 5 watches where you can take a look at many of the top timepieces from Seiko.

I’ve always been a fan of the SNK selection of watches, in the past, I’ve featured many of the canvas strap variations so it’s nice to finally take a closer look at one of the stainless steel strap models. This watch runs on a very reliable 21 jewel automatic movement and is priced very reasonably in my opinion.

After looking into the watch design, quality, features, and pricing this watch received a 8/10 from us at The Watch Blog.

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Where to buy the Seiko SNK355K

I like to stick to listing retailers that I’ve actually had experience buying from in the past. Below I’ve listed some of the top places to buy this watch from, check all for the best price. Variations of this watch include: Seiko SNK355, Seiko SNK355K, Seiko SNK355K1

Buy now at Amazon

Buy at Watch Shop Unavailable

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