SEIKO Diver SKZ178 Automatic Watch
Overview
The Seiko SKZ178 "Superior" (7S36-0230) is a 38mm men's automatic watch with a stainless steel case and a gold analog dial protected by hardlex crystal. It uses a 7S36 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 SKZ178 is currently ranked #738 in popularity out of 751 watches in this catalog. No retailer link is on file for .com; current availability is unknown. This watch is part of a family of eight 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.
SKZ178 is only a partial model number. [learn more]
The case of the SKZ178 measures approximately 38mm wide (not including the crown) by 12mm thick and is water resistant to 100 meters. This should be sufficient for splashes, rain, baths, showers & swimming (shallow diving) but is not recommended for scuba diving. The crown does not screw down which increases the risk that it could be pulled out accidentally while under water. The stainless steel bezel shows minute numbering and can be rotated. The gap between the lugs is 18mm and the bracelet band can be adjusted to fit using a link removal tool or removed using a band removal tool to be replaced with another band.
The SKZ178 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.
- Rotatable bezel
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 
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General
- Retailers No retailer link on file for .com
Search: Amazon | eBay | Chrono24 - Popularity
#738 of 751 - Style Diver
- Gender Men's
Movement
- Type Automatic
- Caliber 7S36
- Jewels 23
- Beats per Hour 21,600 bph(6 bps)
- Power Reserve 43 Hours
- Manual Winding No
- Hacking No
- Instructions Owner's Manual
Case
- Case Width
38mm(without crown) - Case Thickness 12mm
- Case Shape Round
- Case Material Stainless Steel
- Case Code 0230
- Crystal Material Hardlex
- Water Resistance 100 Meters(baths & shallow diving)
- 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 Yes
- Band Material Bracelet
- Band Color Gold, Silver
Dial
- Dial Color Gold
- Dial Reference 0662
- Hour Markings Bars, Triangles
- On the Dial
5 Shield, "Automatic", "Jewels", "Superior", Water Resistance
Bezel
- Bezel Color Gold, Silver
- Bezel Function Unidirectional
- Bezel Material Stainless Steel
- On the Bezel Minute Numbering
Inner Bezel / Chapter Ring / Outer Dial
- Inner Bezel Color Gold
- On Inner Bezel Bars
Hand Colors
- Hour Hand Gold
- Minute Hand Gold
- Second Hand Gold
If you see anything that seems incorrect please let us know.
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