SEIKO Chrono SND139 Quartz Watch
Overview
The Seiko SND139 (7T92-0BJ0) is a 38mm men's quartz watch with a stainless steel case and a silver analog dial protected by hardlex crystal. It uses a 7T92 caliber quartz movement. The watch should run for up to 3 years before needing a new battery.
The SND139 is currently ranked #1,085 in popularity out of 1,137 watches in this catalog. No retailer link is on file for .com; current availability is unknown. 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 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.
SND139 is only a partial model number. [learn more]
The case of the SND139 measures approximately 38mm wide (not including the crown) by 10mm 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 a tachymeter and is fixed (cannot be rotated). The gap between the lugs is 18mm and the bracelet band can be adjusted to fit using a link removal tool but may be difficult to replace with another band due to the shape of the lugs.
The SND139 provides the following features and complications:
- Second hand
- Seconds subdial
- Minute hand
- Hour hand
- Chronograph that includes subdials for hours, minutes and subseconds with a minimum resolution of 1/20 second and a maximum duration of 720 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 No retailer link on file for .com
Search: Amazon | eBay | Chrono24 - Popularity
#1,085 of 1,137 - Style Chronograph
- Gender Men's
Movement
- Type Quartz
- Caliber 7T92
- Power Reserve 3 Years
- Hacking Yes
- Instructions Owner's Manual
Case
- Case Width
38mm(without crown) - Case Thickness 10mm
- Case Shape Round
- Case Material Stainless Steel
- Case Code 0BJ0
- Crystal Material Hardlex
- Water Resistance 100 Meters(baths & shallow diving)
- Crown Position 03:00
- Screw Down Crown No
- Second Crown No
Complications
- Chrono Maximum 720 Minutes
- Chrono Minimum 1/20 of a Second
- Chrono Sub-Sec Yes
- Chrono Minutes Yes
- Chrono Hours Yes
- Second Hand Yes
- Seconds Subdial Yes
- Minute Hand Yes
- Hour Hand Yes
- Date Window Yes
Band
- Band Width 18mm
- Replaceable Band No / Difficult
- Band Material Bracelet
- Band Color Silver
Dial
- Dial Color Silver
- Dial Reference 0BE8
- Hour Markings Arabic Numerals
- Subdial Position 6-9-12
- On the Dial
"Chronograph", Water Resistance
Bezel
- Bezel Color Silver
- Bezel Function Fixed
- Bezel Material Stainless Steel
- On the Bezel Tachymeter
Inner Bezel / Chapter Ring / Outer Dial
- Inner Bezel Color Silver
- 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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