StoreDeal.ai store
Shop
  • Deals
  • Deal checker
  • Black Friday
  • Buying guides
  • Brands
  • Stores
Travel
  • Flight deals
  • Hotel deals
Company
  • Research
  • Press
  • Use in AI assistants
  • Contact
  • deal.ai apps
Black Friday 2026
  • Walmart
  • Best Buy
  • Target
  • TVs
  • Laptops
  • Headphones
  • Apple
  • Gaming
  • Vacuums
  • Kitchen
  • Toys
  • Smartwatches
  • Tablets
  • Furniture
  • Mattresses
© Deal.ai Inc.·2222 Ponce de Leon Blvd, Miami, FL 33134·support@deal.ai
TermsPrivacy
Deal.ai › Seiko
Seiko
Seiko 5 Automatic 21 Jewels SNK355 SNK355K1 SNK355K Men's Watch

Seiko 5 Automatic 21 Jewels SNK355 SNK355K1 SNK355K Men's Watch

5(2 ratings)

Best price now

$284.99at Nubo WatchesChecked Nov 9

Prices are checked against each store and labelled with when.

Visit Nubo Watches

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Enter to send, Shift+Enter for a new line

Price facts

  • Last seen at $284.99 at Nubo Watches on Nov 9.

Our take on the Seiko 5 Automatic 21 Jewels SNK355 SNK355K1 SNK355K Men's Watch

The Seiko 5 SNK355K1 is a men's mechanical watch with a 21-jewel automatic self-winding movement, a stainless steel case and bracelet, and a day-date display. It is the entry point into Seiko's long-running Seiko 5 line: a simple, legible everyday watch that never needs a battery. Against quartz rivals it trades convenience for mechanical character, and against pricier Seiko 5 Sports models it gives up water resistance depth and sporty styling. Owners value it as an affordable first automatic that keeps decent time and looks good with casual clothes.

Best forFirst-time automatic watch buyersEveryday casual wearAnyone who wants a battery-free watchGift for a young or new watch wearer
Pros
  • Automatic self-winding movement, no battery changes
  • 21-jewel movement with day-date display
  • Stainless steel case and bracelet
  • Classic, minimal dial that suits casual wear
  • Long-established Seiko 5 reliability
Cons
  • Modest water resistance, not for swimming
  • No hacking or hand-winding on this movement
  • Bracelet is basic and rattly for some owners
  • Accuracy is good but not quartz-level

Seiko 5 Automatic 21 Jewels SNK355 SNK355K1 SNK355K Men's Watch prices at every store

  • Nubo WatchesNew

    In stockReturn policy

    $284.99Checked Nov 9
    Visit Nubo Watches

What reviewers say

Owners of the Seiko 5 SNK series generally praise it as a dependable, good-looking first automatic that punches above its class. Common complaints are the light, jangly bracelet and modest water resistance.

What people mention
  • MovementPraisedOwners like the self-winding 21-jewel movement and the fact that it never needs a battery.
  • BraceletCriticisedMany say the stock steel bracelet feels light and rattly, and some swap it for a strap.
  • AccuracyMixedTimekeeping is generally good for a mechanical watch, but owners note it drifts a few seconds a day.
  • Water resistanceCriticisedBuyers warn it is not suited to swimming or showering.
  • ValuePraisedReviewers call it one of the best entry-level automatics available.

About the Seiko 5 Automatic 21 Jewels SNK355 SNK355K1 SNK355K Men's Watch

The Seiko 5 Automatic SNK355K1 is a men's analog watch with a 21-jewel automatic self-winding movement. The case and bracelet are stainless steel.

It shows the day and date. The design is classic and minimal.

Brand
Seiko
Model
Seiko 5 Automatic SNK355K1
Gender
Men's
Movement
Automatic self-winding, 21 jewels
Display
Analog, with day and date
Case and bracelet
Stainless steel
Color
Silver
Weight
500 g

Questions and answers

Is the Seiko 5 SNK355K1 a good first automatic watch?
Yes. It is a simple, reliable automatic with a day-date and a classic dial, and it is widely recommended as a first mechanical watch.
Does it need a battery?
No. The 21-jewel movement is self-winding and runs on the motion of your wrist, with a power reserve that lasts about a day off the wrist.
Can I swim with it?
It is not built for swimming. Treat it as splash-resistant and take it off before swimming or showering.
Does the movement hack or hand-wind?
This generation of the Seiko 5 movement does not hack (the seconds hand keeps running when you set the time) and does not hand-wind. Shake it to start it.
What is in the box?
The watch on its stainless steel bracelet, with tags and paperwork. It is sold new in box.
How does it compare with the Seiko 5 Sports models?
The SNK355K1 is smaller and dressier, with less water resistance. Seiko 5 Sports models add sportier styling and better water resistance.
Where is the Seiko 5 Automatic 21 Jewels SNK355 SNK355K1 SNK355K Men's Watch cheapest?
At Nubo Watches, for $284.99, as of our latest check.
What do buyers say about the Seiko 5 Automatic 21 Jewels SNK355 SNK355K1 SNK355K Men's Watch?
Rated 5 out of 5 from 2 ratings.

More from Seiko

  • S
    Seiko 5 Sports Automatic 21 Jewels SNKL41 SNKL41K1 SNKL41K Men's Watch
    Seiko 5 Sports Automatic 21 Jewels SNKL41 SNKL41K1 SNKL41K Men's Watch
  • S
    Seiko 5 Sports HDB002
    Seiko 5 Sports HDB002
  • S
    Seiko 5 Sports (SRPG41)
    Seiko 5 Sports (SRPG41)
  • M
    Montre Automatique Homme Seiko 5 Sports SRPE75K1 Champagne Bracelet Maille Acier
    Montre Automatique Homme Seiko 5 Sports SRPE75K1 Champagne Bracelet Maille Acier
  • S
    Seiko 5 Sports 38mm Men's Automatic Watch Rinse Blue Dial - SRPK87K1
    Seiko 5 Sports 38mm Men's Automatic Watch Rinse Blue Dial - SRPK87K1
  • S
    Seiko 5 Sports (SRPG27)
Seiko 5 Sports (SRPG27)
  • S
    Seiko 5 Sports (SRPL05)
    Seiko 5 Sports (SRPL05)
  • S
    Seiko 5 Sports SKX GMT Automatic Sky Blue Dial Silver Steel Strap Watch For Men - SSK033K1
    Seiko 5 Sports SKX GMT Automatic Sky Blue Dial Silver Steel Strap Watch For Men - SSK033K1
  • All Seiko deals and products →

    More men's automatic watches

    • O
      Orient 2nd Generation Bambino Version 3 Classic Automatic FAC0000DB0 AC0000DB Men's Watch
      Orient 2nd Generation Bambino Version 3 Classic Automatic FAC0000DB0 AC0000DB Men's Watch
    • O
      Orient 2nd Generation Bambino Version 3 Automatic FAC0000DD0 Men's Watch
      Orient 2nd Generation Bambino Version 3 Automatic FAC0000DD0 Men's Watch
    • S
      SUFEADYE Men's Mechanical Automatic Watch
      SUFEADYE Men's Mechanical Automatic Watch
    • C
      Citizen Automatic Watch
      Citizen Automatic Watch
    • S
      SKMEI Mens Luxury Skeleton Automatic Mechanical Wrist Watches
      SKMEI Mens Luxury Skeleton Automatic Mechanical Wrist Watches
    • T
      Tissot Men's Chemin Des Tourelles Powermatic 80 Automatic 42mm Watch
      Tissot Men's Chemin Des Tourelles Powermatic 80 Automatic 42mm Watch
    • A
      AESOP Men Flying Tourbillon Movement Mechanical Automatic Luxury Watches
      AESOP Men Flying Tourbillon Movement Mechanical Automatic Luxury Watches
    • F
      Forsining Men's Octagonal Skeleton Automatic Mechanical Watch
      Forsining Men's Octagonal Skeleton Automatic Mechanical Watch