SEIKO Chrono SNN239 Quartz Watch
Overview
The Seiko SNN239 (7T94-0BL0) is a 42mm men's quartz watch with a stainless steel case and a green analog dial protected by hardlex crystal. It uses a 7T94 caliber quartz movement. The watch should run for up to 5 years before needing a new battery.
The SNN239 is currently ranked #121 in popularity out of 1,137 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 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.
SNN239 is only a partial model number. [learn more]
The case of the SNN239 measures approximately 42mm wide (not including the crown) by 11mm 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 is fixed (cannot be rotated). The gap between the lugs is 20mm and the canvas band can be removed using a band removal tool to be replaced with another band.
Transform the look of this watch by adding a 20mm leather band such as a Hadley Roma, Hirsch or Crown & Buckle.
The SNN239 provides the following features and complications:
- Second hand
- Seconds subdial
- Minute hand
- Hour hand
- Chronograph that includes a subdial for minutes with a minimum resolution of 1/5 second and a maximum duration of 60 minutes. The central second hand is used by the chronograph. When the chronograph is not in use this hand is stationary. Seconds are shown on the seconds subdial.
- 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
#121 of 1,137 - Style Military / Field, Chronograph
- Gender Men's
Movement
- Type Quartz
- Caliber 7T94
- Power Reserve 5 Years
- Hacking Yes
- Instructions Owner's Manual
Case
- Case Width
42mm(without crown) - Case Thickness 11mm
- Case Shape Round
- Case Material Stainless Steel
- Case Code 0BL0
- Crystal Material Hardlex
- Water Resistance 100 Meters(baths & shallow diving)
- Crown Position 03:00
- Screw Down Crown No
- Second Crown No
Complications
- Chrono Maximum 60 Minutes
- Chrono Minimum 1/5 of a Second
- Chrono Minutes Yes
- Second Hand Yes
- Seconds Subdial Yes
- Minute Hand Yes
- Hour Hand Yes
- Date Window Yes
Band
- Band Width 20mm
- Replaceable Band Yes
- Band Material Canvas
- Band Color Green
Dial
- Dial Color Green
- Dial Reference
- Hour Markings Arabic Numerals
- Subdial Position 6-12
- On the Dial
"Chronograph", Water Resistance
Bezel
- Bezel Color Silver
- Bezel Function Fixed
- Bezel Material Stainless Steel
- On the Bezel Nothing
Inner Bezel / Chapter Ring / Outer Dial
- Inner Bezel Color Green
- On Inner Bezel Bars, Triangles
Hand Colors
- Hour Hand Orange
- Minute Hand Orange
- Second Hand Black, White
If you see anything that seems incorrect please let us know.
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