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SEIKO 5 SSA315 Automatic Watch
Overview
The Seiko SSA315 is a 44mm men's automatic watch with a stainless steel case and a black analog dial protected by hardlex crystal. It uses a 4R37 caliber self-winding mechanical movement that can be manually wound and hacked (the second hand stops 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 41 hours when fully wound and will self-wind when moved.
The SSA315 is currently ranked #238 in popularity out of 2,613 watches in this catalog. This watch does not appear to be available for purchase on any .com site. You can see other models similar to this one 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.
This model may be available in other countries and currencies.
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Availability Alert
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SSA315 is only a partial model number. [learn more]
The case of the SSA315 measures approximately 44mm wide (not including the crown) by 13mm 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 watch has a display back to show of the 4R37 movement.The stainless steel bezel is fixed (cannot be rotated). The gap between the lugs is 22mm 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.
Transform the look of this watch by adding a 22mm leather band such as a Hadley Roma, Hirsch or Crown & Buckle.
The SSA315 provides the following features and complications:
- Second hand
- Minute hand
- Hour hand
- 24 hour subdial to show if it is morning or night
- 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
- Price
- Popularity
#238 of 2,613 - Style Sports
- Gender Men's
Movement
- Type Automatic
- Caliber 4R37
- Jewels 24
- Beats per Hour 21,600 bph(6 bps)
- Power Reserve 41 Hours
- Manual Winding Yes
- Hacking Yes
- Instructions Owner's Manual
Case
- Case Width
44mm(without crown) - Case Thickness 13mm
- Case Shape Cushion
- Case Material Stainless Steel
- Case Code
- Crystal Material Hardlex
- Water Resistance 100 Meters(baths & shallow diving)
- Crown Position 03:00
- Screw Down Crown No
- Second Crown No
Complications
- Second Hand Yes
- Minute Hand Yes
- Hour Hand Yes
- 24 Hour Subdial Yes
- Date Window Yes
Band
- Band Width 22mm
- Replaceable Band Yes
- Band Material Bracelet
- Band Color Black
Dial
- Dial Color Black
- Dial Reference
- Hour Markings Bars
- On the Dial
5 Shield, "Automatic", "Jewels", Minute Numbering, "SPORTS", Water Resistance
Bezel
- Bezel Color Black
- Bezel Function Fixed
- Bezel Material Stainless Steel
- On the Bezel Nothing
Inner Bezel / Chapter Ring / Outer Dial
- Inner Bezel Color White
- On Inner Bezel Nothing
Hand Colors
- Hour Hand Gold
- Minute Hand Gold
- Second Hand Gold, Red 5
If you see anything that seems incorrect please let us know.
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