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SEIKO Diver SRPA81 Automatic Watch

Overview

The Seiko Prospex SRPA81 "Tuna" (4R36-05V0) is a 52mm men's automatic watch with a stainless steel case and a black analog dial protected by hardlex crystal. It uses a 4R36 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 SRPA81 is currently ranked #307 in popularity out of 751 watches in this catalog. This watch does not appear to be available for purchase on any .com site. This watch is part of a family of four 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.

SRPA81 is only a partial model number. [learn more]

The case of the SRPA81 measures approximately 52mm wide (not including the crown) by 13mm thick and is water resistant to 200 meters. This should be sufficient for splashes, rain, baths, showers, swimming and even scuba diving. The crown screws down to help prevent it from being accidentally pulled out while under water. The stainless steel bezel shows minute numbering and can be rotated. The gap between the lugs is 22mm and the rubber band can be removed using a band removal tool to be replaced with another band.

The SRPA81 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


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 SRPA81 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

  • Price
    $0.00 on
    (as of )
    $0.00 on
    (as of )

  • Popularity #307 of 751
  • Style Diver 
  • Gender Men's 

Movement

  • Type Automatic
  • Caliber 4R36
  • 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 52mm(without crown)
  • Case Thickness 13mm
  • Case Shape Round 
  • Case Material Stainless Steel 
  • Case Code 05V0 
  • Crystal Material Hardlex 
  • Water Resistance 200 Meters(scuba diving)
  • Crown Position 04:00 
  • Screw Down Crown Yes 
  • Second Crown No 

Complications

  • Second Hand Yes 
  • Minute Hand Yes 
  • Hour Hand Yes 
  • Day Window Yes 
  • Date Window Yes 

Band

  • Band Width 22mm
  • Replaceable Band Yes 
  • Band Material Rubber 
  • Band Color Black 

Dial

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

    "Automatic", "Diver's", Water Resistance
     

Bezel

  • Bezel Color Black 
  • Bezel Function Unidirectional 
  • Bezel Material Stainless Steel 
  • On the Bezel Minute Numbering

Inner Bezel / Chapter Ring / Outer Dial

  • Inner Bezel Color Black 
  • On Inner Bezel Bars

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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