The Seiko SSB477, SSB479, and SSB481 are dial variants of the same 8T63 quartz chronograph: blue, black, and green with rose-gold-tone accents, respectively. Seiko’s published specifications show a shared core platform, so the practical choice is mainly dial appearance, fit, and local buying conditions. Seiko describes the movement as quartz; “mechaquartz” is a descriptive label, not an indication that these are fully mechanical watches.
Seiko SSB477 vs. SSB479 vs. SSB481
| Reference | Dial | Movement | What distinguishes it |
|---|---|---|---|
| SSB477 / SSB477P1 | Blue | Seiko 8T63 quartz | Blue dial |
| SSB479 / SSB479P1 | Black | Seiko 8T63 quartz | Black dial |
| SSB481 / SSB481P1 | Green with rose-gold-tone accents | Seiko 8T63 quartz | Green dial and rose-gold-tone accents |
Seiko’s product pages list the same movement and core specifications for these models. The available research does not establish a performance difference between the color variants. Check the exact reference, local price, stock, seller, and warranty when shopping; regional listings and availability can vary.
What does “mechaquartz” mean here?
Seiko officially specifies caliber 8T63 as a quartz movement. Seiko lists accuracy of ±15 seconds per month and an approximate three-year battery life; these are manufacturer specifications, not independent test results. The term “mechaquartz” is commonly used as a category description, but it should not be taken to mean that the watch has a fully mechanical movement.
These watches use a battery-powered quartz movement and do not offer the mainspring-driven operation of a mechanical chronograph. Choose them if the shared quartz specification and chronograph functions suit your needs; choose a mechanical watch if owning a mechanical movement is a priority.
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- Use and Maintenance: Please avoid soaking your leather strap in the water repeatedly and continued sunlight exposure. It is not recommended to wear it to shower or swim
Functions and chronograph limits
Seiko lists these functions for the 8T63 models:
- Hours and minutes
- Small seconds
- 24-hour hand
- Date display
- Chronograph up to 60 minutes, in 1/5-second increments
The 24-hour hand is listed as a function, but the product information does not establish that it is an independently adjustable second time zone. Consult the instruction manual for operation and date-setting guidance.
Case dimensions and wearing profile
Seiko lists these dimensions for the trio:
| Specification | Seiko-listed figure |
|---|---|
| Case diameter | 38.7 mm |
| Lug-to-lug | 45.1 mm |
| Thickness | About 12.6 mm |
| Lug width | 20 mm |
Compare these measurements with your fit preferences and wrist. Dimensions alone cannot guarantee how a watch will wear, and the cited research does not include independent fit testing.
Crystal, bracelet, and materials
The cited Seiko UK boutique listings specify a box-shaped Hardlex crystal and stainless-steel bracelet. Seiko’s cited product information does not list sapphire crystal for these models. Seiko also lists a 20 mm lug width; that measurement may help when considering a replacement strap, but it does not confirm that a particular strap or fitted end link will fit.
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- Disclaimer: For assisting consumers in selecting watch bands for their watches, we include certain brands and models of watches in our listings. However,we have no affiliation, partnership, or endorsement with these brands.Products listed that we sell are not manufactured by or officially affiliated with the listed brands.
Water resistance
Seiko lists water resistance of 5 bar for these references. Use the manufacturer’s rating as stated, and consult Seiko’s guidance for activity-specific questions. The research does not establish suitability for particular water activities.
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SSB477: blue dial
Choose the SSB477 if you prefer the blue dial. The cited product information identifies its color, while the core movement and dimensions are shared with the other references.
SSB479: black dial
The SSB479 is the black-dial variant. Select it for its appearance rather than an assumed technical upgrade: the research does not show a performance advantage over the blue or green versions.
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SSB481: green dial with rose-gold-tone accents
The SSB481 is the green variant, with rose-gold-tone accents in the cited Seiko listing. Choose it if that combination is the one you prefer; the available research does not establish different performance specifications.
Price and availability
Prices and stock depend on region and can change. The cited Seiko UK boutique listing displayed £430 for the SSB479P1 and marked it out of stock when crawled; that is a regional listing snapshot, not a current universal price or availability promise. The research does not verify current U.S. prices or retailer inventory. Check Seiko or a local authorized dealer for the exact reference, current price, stock, and warranty before buying.
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Straps and customization
Seiko lists a 20 mm lug width, which makes other 20 mm straps a possible option to explore. Lug width alone does not verify that a particular strap or bracelet will fit. Check the actual end fitting, spring bars, and case clearance before ordering.
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- Comfortable Wear: This strap features smooth edges, soft touch, lightweight, flexible but durable structure. It is completely odorless, ensuring a pleasant experience throughout the day.
- Washable and Waterproof: Waterproof and easy to clean, this strap is ideal for outdoor fitness, sports, intense workouts, or everyday use, offering durability and convenience in all occasions.
- Versatile Compatibility: Available in multiple lug widths (12mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 24mm), this collection is compatible with most mechanical watch, quartz watch and smart watches. To ensure a proper fit for your strap, please measure the inner distance in millimeters between the two lugs of your watch.
- Available Wrist Length: Our silicone quick release straps are designed to fit most wrist sizes, ranging in circumference from about 5.4 to 8.2 inches, depending on the diameter of the watch. This versatile range ensures a comfortable fit for men and women.
Battery and maintenance
Seiko lists an approximate three-year battery life for the 8T63. Actual battery life can vary; the cited research does not establish a replacement cost or service policy. Consult the instruction manual or a qualified service provider for battery replacement and operating instructions.
Who should buy the Seiko SSB477, SSB479, or SSB481?
- Choose the SSB477 if you prefer the blue dial.
- Choose the SSB479 if you prefer the black dial.
- Choose the SSB481 if you prefer the green dial with rose-gold-tone accents.
- Consider any of them if the shared quartz chronograph functions and listed dimensions suit you.
- Compare alternatives if you require specifications or features not established by the cited product information.
Verdict
The SSB477, SSB479, and SSB481 are three dial variants of Seiko’s 8T63 quartz chronograph, with no documented performance difference in the cited research. Seiko lists a 60-minute chronograph in 1/5-second increments, a 38.7 mm diameter, 45.1 mm lug-to-lug, about 12.6 mm thickness, 20 mm lug width, and 5 bar water resistance. Pick among them by dial preference and check local buying conditions before purchase.
FAQ
What is the difference between the Seiko SSB477, SSB479, and SSB481?
The cited product pages establish their dial differences: blue for the SSB477, black for the SSB479, and green with rose-gold-tone accents for the SSB481. The research shows a shared movement and core specifications, with no documented performance difference.
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Are the Seiko SSB477, SSB479, and SSB481 the same watch?
They are variants of the same 8T63 quartz chronograph platform, distinguished in the cited listings primarily by dial appearance. Check the exact reference and regional listing when purchasing.
Are these Seiko watches mechanical?
No. Seiko specifies the 8T63 as a quartz movement. “Mechaquartz” is a descriptive category label, not a claim that these watches use a fully mechanical movement.
How long can the 8T63 chronograph measure?
Seiko lists a maximum of 60 minutes in 1/5-second increments.
What are the dimensions of the SSB477, SSB479, and SSB481?
Seiko lists a 38.7 mm diameter, 45.1 mm lug-to-lug, about 12.6 mm thickness, and 20 mm lug width.
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What is the water-resistance rating?
Seiko lists 5 bar water resistance. Consult the manufacturer’s guidance for questions about specific activities.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
