6309-7040 bezel insert

Probable

Printed 60-minute insert with a luminous pip at zero. Aluminium inserts fade, chip and lose their pip lume over decades of wear, so an original insert on a 1970s or 1980s watch shows damage as a matter of course. Reproduction inserts for this case are among the most widely manufactured watch parts in existence.

Part reference

Brand: Seiko
Material: Anodised aluminium
Identifying marks: Print weight and numeral spacing are the comparison points; originals show fading consistent with the dial and hands.

Documented variations

Classification

FactoryDocumented as shipped from the factory for this reference and period.PeriodNot original to this watch, but correct for its production period.ServiceFitted by the manufacturer's own service network. Not a defect.AftermarketThird-party part. Affects originality, not authenticity.ModifiedGenuine parts in a configuration the factory did not sell. Affects originality and value, not authenticity.CounterfeitDeceptive reproduction intended to pass as genuine.UnknownEvidence on file does not settle the question.

Original factory insert
FactoryProbable
1976–1988
Fading and pip degradation consistent with the rest of the watch.
Aftermarket reproduction insert
AftermarketHigh confidence
Whole production
Sharper printing, a brighter modern pip, and colour that does not match the watch's ageing. Extremely common and usually a straightforward replacement of a worn part — this should be recorded and then largely set aside, not treated as a signal about the watch's authenticity.

Documented on these references

Seiko 6309-7040Factory
1976–1988
Factory insert for the export Turtle.
Seiko 6309-7049Factory
1976–1988
Shared with the -7040; the market code does not change the case parts.
Seiko 6306-7001Factory
Whole production
The JDM and export Turtles share the case and its bezel parts; the difference between them is in the movement.

Provenance of this record

Sources & Evidence

Secondary sourceCollector research

The Seiko Guy — model and reference guides

The Seiko Guy

Accessed: 2026-08-18

Cited for

This referenceProbable

View source ↗

Community sourceCommunity knowledge

The Watch Site — Seiko reference and dial-code discussion

The Watch Site

Accessed: 2026-08-18