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SEIKO 5 SSA172 Automatic Watch

SSA172

Overview

The Seiko SSA172 is a 43mm 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 SSA172 is currently ranked #699 in popularity out of 2,613 watches in this catalog. Check availability on Amazon.com. This watch is part of a family of six 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 pagein the similar watches section below. 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.

SSA172 is only a partial model number. [learn more]

The case of the SSA172 measures approximately 43mm 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 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.

The SSA172 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.


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. If the SSA172 is not exactly what you're looking for you can also search our catalog by selecting from an extensive list of criteria to help you find exactly what you are looking for.

General

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 43mm(without crown)
  • Case Thickness 12mm
  • Case Shape Round 
  • Case Material Stainless Steel 
  • Case Code  
  • Crystal Material Hardlex 
  • Water Resistance 100 Meters(baths & shallow diving)
  • Crown Position 12:00 
  • 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 Silver 

Dial

  • Dial Color Black 
  • Dial Reference  
  • Hour Markings Bars, Triangles 
  • On the Dial

    5 Shield, "Automatic", "Jewels", "SPORTS", Water Resistance
     

Bezel

  • Bezel Color Gold 
  • Bezel Function Fixed 
  • Bezel Material Stainless Steel 
  • On the Bezel Nothing

Inner Bezel / Chapter Ring / Outer Dial

  • Inner Bezel Color Black 
  • On Inner Bezel Minute Numbering, Bars

Hand Colors

  • Hour Hand Gold 
  • Minute Hand Gold 
  • Second Hand Gold, Red 5 

If you see anything that seems incorrect please let us know.

SSA172


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