Description
SEIKO ASTRON Nexter HAC003J
A compact titanium radio-controlled solar watch inspired by the traditional Edo Purple color
Watch Type: Analog radio-controlled solar watch
Core Features: Edo Purple gradient dial, pure titanium construction, 36.0 mm case, radio time-signal reception, and sapphire crystal
Market Designation: Japanese Domestic Market limited edition of 500 pieces
About the Watch
The SEIKO ASTRON Nexter HAC003J is a 145th anniversary limited edition created around Edo Purple, a traditional color associated with the cultural heritage and creative character of Tokyo. Its purple dial combines a vertical gradient with a horizontal pattern that varies in width, producing a layered appearance as the light changes. Gold-tone details provide a restrained anniversary accent.
This compact model pairs a 36.0 mm pure titanium case with a matching titanium bracelet. The bracelet’s polished center row adds contrast to the otherwise contemporary design, while the sapphire crystal features Seiko’s Super-Clear Coating. At 8.7 mm thick and 78 g, the watch offers a relatively slim and lightweight configuration without relying on an oversized case.
Key Highlights
- Japan-limited 145th anniversary edition restricted to 500 pieces
- Edo Purple gradient dial with a distinctive variable-width horizontal pattern and gold-tone accents
- Pure titanium case and bracelet protected by Seiko’s DiaShield surface treatment
- Caliber 7B62 combines solar charging with automatic radio-controlled time correction
- Compact 36.0 mm case with sapphire crystal and 10-bar water resistance
Movement and Performance
Solar radio-controlled caliber 7B62 receives standard time signals transmitted from Japan, China, the United States, Germany, and the United Kingdom. When a signal cannot be received, the manufacturer-rated accuracy is an average of ±15 seconds per month. A full charge provides approximately nine months of operation, extending to approximately two years when the power-saving function is active.
Timekeeping Functions
The movement supports automatic and manual signal reception, reception-result indication, time-difference adjustment, and automatic hand-position correction. Its full auto-calendar is programmed through December 31, 2099. Actual radio reception depends on the wearer’s location, surroundings, transmitter coverage, and signal conditions.
Product Specifications
Brand: SEIKO
Collection: SEIKO ASTRON
Series: Nexter
Product Name: Seiko 145th Anniversary Limited Edition
Model / Reference Number: HAC003J
Market Designation: Japanese Domestic Market
Country of Manufacture: Japan
Gender Classification: Men’s
Watch Type: Radio-controlled solar watch
Display Type: Analog
Dial Color: Edo Purple
Dial Features: Purple gradient, variable-width horizontal pattern, and gold-tone accents
Case Dimensions: 42.0 × 36.0 × 8.7 mm
Weight: 78 g
Case Material: Pure titanium
Surface Treatment: DiaShield
Crystal: Sapphire crystal
Crystal Coating: Super-Clear Coating
Band / Bracelet: Titanium bracelet with polished center row
Clasp: One-push three-fold clasp with Smart Adjuster mechanism
Water Resistance: 10 bar
Magnetic Resistance: Magnetic resistance provided
Movement Type: Solar radio-controlled quartz
Caliber: 7B62
Jewels: 6
Accuracy: Average ±15 seconds per month when a radio signal is not received
Approximate Operating Time: Approximately 9 months from a full charge; approximately 2 years with power saving
Radio-Controlled Timekeeping: Receives standard time signals from Japan, China, the United States, Germany, and the United Kingdom
Core Functions: Automatic and manual signal reception, reception-result display, time-difference adjustment, automatic hand-position correction, and full auto-calendar through December 31, 2099
Case-Back: Marked “LIMITED EDITION”
Release Date: October 9, 2026
Limited Edition: Limited to 500 pieces in Japan
JAN Code: 4954628474971