[Status]
- Wrist size: approx. 15cm (approx. 5.9 inches)
- Although it shows some signs of use, it is still in good condition for further wear.
• Model: SEIKO Brightz SAGZ081 (Cal. 7B24-0BH0).
• Series: Brightz Radio-Controlled Solar Series.
• Nickname: “Black Dial Titanium Brightz”.
• Type: Solar Radio-Controlled Titanium Dress Watch.
• Release era: 2015–2016.
• Market: Japanese Domestic Market (JDM).
• Design inspiration: Developed as a premium business watch combining lightweight titanium construction, solar-powered convenience, radio-controlled accuracy, and refined Japanese design. The SAGZ081 is the black-dial counterpart to the popular SAGZ079.
Case & build
• Case size: 39.0 mm diameter.
• Thickness: 8.8 mm.
• Lug-to-lug: approximately 46 mm.
• Weight: approximately 76 g.
• Case material: Titanium with super-hard coating.
• Band: Titanium bracelet.
• Glass: Sapphire crystal with Super Clear Coating.
• Water resistance: 100 m / 10 bar.
• Screw-down crown.
• Anti-magnetic construction.
• Three-fold push-button clasp.
• Made in Japan.
Design concept
• Part of Seiko's premium Brightz collection, positioned above the Spirit series in the JDM lineup.
• Features a deep black dial with subtle sunburst finishing that changes appearance depending on lighting conditions.
• Faceted hands and applied markers maximize legibility while maintaining an elegant business-watch aesthetic.
• Titanium construction dramatically reduces weight compared with stainless-steel watches of similar size.
• Super Clear Coating minimizes reflections and enhances dial visibility.
• The slim 8.8 mm profile allows effortless wear under shirt cuffs.
• Designed for professionals seeking advanced technology without a sporty appearance.
• Frequently regarded as one of the most balanced Brightz references ever produced.
Functions
• Solar-powered operation.
• Radio-controlled time synchronization.
• Perpetual calendar (to December 31, 2099).
• Date display.
• Automatic radio reception.
• Manual radio reception.
• Reception result indicator.
• Time-zone adjustment function.
• Automatic hand-position correction.
• Power-save mode.
• Low-charge warning function.
• Overcharge prevention function.
Power
• Caliber: 7B24.
• Movement type: Solar radio-controlled quartz.
• Accuracy: ±15 seconds per month without radio synchronization.
• Power reserve: approximately 6 months when fully charged.
• Power-save mode: approximately 1.5 years.
• Radio signal reception: Japan, China, USA, Germany, and UK transmitters.
• No routine battery replacement required.
Key highlights
• One of the lightest radio-controlled Seiko watches at approximately 76 g.
• Full titanium construction provides exceptional comfort for daily wear.
• Sapphire crystal with Super Clear Coating is typically reserved for higher-end Seiko models.
• 7B24 movement combines solar charging, perpetual calendar, and atomic-clock synchronization.
• Ultra-thin 8.8 mm profile is remarkable for a solar radio-controlled watch.
• Black dial offers a more versatile and formal appearance than many sports-oriented radio-controlled models.
• Frequently compared to entry-level luxury titanium watches due to its finishing quality and practicality.
• Increasingly sought after since the Brightz line was eventually replaced by newer Astron and Selection models.
Many collectors consider the SAGZ081 one of the finest hidden gems in the Brightz lineup because it combines titanium construction, sapphire crystal, radio-controlled accuracy, solar convenience, perpetual calendar functionality, and an exceptionally slim profile in a watch that delivers premium Japanese engineering while remaining understated and highly wearable.