Seiko 7A28-701A Quartz Chronograph (“Speedmaster”) — Fully Serviced, Original Bracelet

A fully serviced Seiko 7A28-701A quartz chronograph — the reference often nicknamed the “Seiko Speedmaster” for its tri-register dial layout — retaining its original case, dial, hands, and bracelet. This example has been mechanically and electrically verified, fitted with a new crystal and fresh gaskets, and regulated for excellent real-world accuracy. Turn-key and ready to wear.

Video Overview

Bench documentation and overview of this Seiko quartz chronograph.

If the video does not appear, view it directly here: https://youtu.be/fTSm0BtF5Us

Highlights

• Model: Seiko 7A28-701A quartz chronograph (“Speedmaster”)
• Movement: Seiko 7A28 high-grade quartz chronograph caliber
• Originality: Original case, dial, hands, and bracelet retained
• Crystal: New crystal installed
• Gaskets: All new (crown, pushers, caseback)
• Accuracy: Excellent accuracy, near +0.22 seconds per day
• Functions: Chronograph operates correctly and resets as designed
• Power: Fresh battery installed

Condition & Authenticity Notes

• Case presents with clean lines and honest wear consistent with age.
• Dial and hands are original
• Original Seiko bracelet included.

Second Tour Timeworks — restored to be worn, verified to be trusted.