SEIKO 5 SNK603 Automatic Watch
Overview
The Seiko SNK603 (7S26-02F0) is a 36mm men's automatic watch with a stainless steel case and a blue analog dial protected by hardlex crystal. It uses a 7S26 caliber self-winding mechanical movement that cannot be manually wound or hacked (the second hand does not stop when the crown is pulled out). It ticks 6 times per second which gives the second hand a smoother movement than quartz watches which tick once per second. The watch should run for up to 43 hours when fully wound and will self-wind when moved.
The SNK603 is currently ranked #22 in popularity out of 2,613 watches in this catalog. Check availability on Amazon.com. This watch is part of a family of seven watches that are identical except for their color or strap. You can see the other variations in this family as well as other similar models on the left side of the page. By clicking the checkbox under a similar model you can compare that model with this one side-by-side. We use nearly 100 different weighted criteria to calculate which models are the most similar to one another.
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SNK603 is only a partial model number. [learn more]
The case of the SNK603 measures approximately 36mm wide (not including the crown) by 11mm thick and is water resistant to 30 meters. This should be sufficient for splashes & rain but is not recommended for baths, showers, swimming or diving. The stainless steel bezel is fixed (cannot be rotated). The gap between the lugs is 18mm and the bracelet band can be adjusted to fit using a link removal tool but may be difficult to replace with another band due to the shape of the lugs.
The SNK603 provides the following features and complications:
- Second hand
- Minute hand
- Hour hand
- Day window to show the day of the week including two language choices for the day (English and either Spanish, Arabic, Kanji, Chinese, French, German, Danish or Roman Numerals). When setting the day keep turning the crown to get to the next language. On most models SUN will be red and on some models SAT will be blue.
- Date window to show the day of the month. Note that some watches may be damaged if you attempt to change the date between 8:00 PM and 2:00 AM, in which case you should change the time to be outside that range first then reset the time after adjusting the date. Check your watch manual for details.
Seiko Date Finder
If you have this watch and want to know when it was made simply enter the six digit serial number from the caseback below then click Find Date. Learn more
Specifications [edit]
Full specifications are listed below. Please report any errors by clicking the edit link above then use the appropriate 
icon to provide your input.
General
- Retailers Check availability
Search: eBay | Chrono24 - Popularity
#22 of 2,613 - Style Dress
- Gender Men's
Movement
- Type Automatic
- Caliber 7S26
- Jewels 21
- Beats per Hour 21,600 bph(6 bps)
- Power Reserve 43 Hours
- Manual Winding No
- Hacking No
- Instructions Owner's Manual
Case
- Case Width
36mm(without crown) - Case Thickness 11mm
- Case Shape Round
- Case Material Stainless Steel
- Case Code 02F0
- Crystal Material Hardlex
- Water Resistance 30 Meters(splashes & rain)
- Crown Position 04:00
- Screw Down Crown No
- Second Crown No
Complications
- Second Hand Yes
- Minute Hand Yes
- Hour Hand Yes
- Day Window Yes
- Date Window Yes
Band
- Band Width 18mm
- Replaceable Band No / Difficult
- Band Material Bracelet
- Band Color Silver
Dial
- Dial Color Blue
- Dial Reference 05T2
- Hour Markings Bars
- On the Dial
5 Shield, "Automatic", "Jewels"
Bezel
- Bezel Color Silver
- Bezel Function Fixed
- Bezel Material Stainless Steel
- On the Bezel Nothing
Inner Bezel / Chapter Ring / Outer Dial
- Inner Bezel Color Blue
- On Inner Bezel Bars, Circles
Hand Colors
- Hour Hand Silver
- Minute Hand Silver
- Second Hand Silver
If you see anything that seems incorrect please let us know.
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