Seiko 5 Actus Automatic Blue Steel Day-Date 1969 40mm

Watch Summary

The Seiko 5 Actus Automatic 6106-8440 is a strong late-1960s Seiko with a striking Blue Steel dial, full 40mm case and the clean, sporty styling that makes the Actus line so wearable today. Its automatic 23-jewel 6106 movement and bilingual English/Kanji day-date display give it both practical appeal and period-correct Seiko character.

This collector-led 1969 example retains its original dial, hands, crystal, case, case back and movement, giving it the originality that matters most in a vintage Seiko of this era. It is fitted on a new replacement leather strap for immediate wear. Replacement components are clearly disclosed below.

TickerWorks Assurance

Passed the TickerWorks 48-hour run test and time check, with the day-date and quickset functions operating correctly. Timegrapher snapshot at the time of testing: +6 seconds/day, 210° amplitude and 0.7 ms beat error.

Condition & Originality

Originality: Original dial, hands, mineral-glass crystal, case, case back and Seiko 6106 automatic movement.

Replacement Components: Fitted on a new replacement leather strap.

Condition: The dial shows visible vintage patina consistent with age.

Bracelet or Strap: Supplied on a new premium leather strap.

Specifications

• Brand: Seiko
• Model: Seiko 5 Actus Automatic 6106-8440
• Movement: Seiko calibre 6106 automatic, 23 jewels
• Case size: 40mm
• Dial: Blue Steel
• Period: 1969
• Case back: Original case back
• Crown: Correct period-appropriate crown fitted with smooth operation
• Strap: New premium leather strap, replacement
• Functions: Automatic, day-date display, quickset day-date, English/Kanji calendar
• Testing: TickerWorks 48-hour run test and time check passed

Historical Context

The Seiko 5 Actus line sits within Seiko’s late-1960s push toward sportier automatic watches, combining bold dial finishes, practical day-date functionality and the durable everyday character that defined the broader Seiko 5 family. Watches using the 6106 movement are well regarded for their distinctly period Japanese styling and their place in Seiko’s rapid expansion of automatic model ranges during this era.

TickerWorks Strap & Bracelet Policy

TickerWorks may supply a replacement or period-correct bracelet or strap where the original is not available or no longer suitable for use. Any replacement is clearly stated in the description. All bracelets and straps are fitted for presentation and checked for secure attachment only.

TickerWorks does not offer bracelet adjustment services. Final sizing should be carried out by a qualified watchmaker.

Notes & Caveats

Photos form part of the description.

Water resistance is not guaranteed.

Timekeeping performance is in line with accepted vintage mechanical tolerance (approximately ±1 minute per day).

Service history is unknown unless stated.