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The Seiko SBBN031 "Marinemaster Tuna" is a 48mm men's quartz watch with a stainless steel case and a black analog dial protected by hardlex crystal. It uses a 7C46 caliber quartz movement. The watch should run for up to 5 years before needing a new battery.
The SBBN031 is currently ranked #80 in popularity out of 751 watches in this catalog and is on sale for $1,049.99 on Amazon.com (as of 2020‑07‑10 08:00 PDT - Details). There are two model numbers for this watch which indicate different distribution locations, a different band type, or different text on the dial. The alternate model number is SBBN015. This watch is part of a family of three 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.
This model may be available in other countries and currencies.
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SBBN031 is only a partial model number. [learn more]
The case of the SBBN031 measures approximately 48mm wide (not including the crown) by 15mm thick and is water resistant to 300 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 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 SBBN031 provides the following features and complications:
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
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
Movement
Case
Complications
Band
Dial
Bezel
Inner Bezel / Chapter Ring / Outer Dial
Hand Colors
If you see anything that seems incorrect please let us know.