Bezel insert
6105-8110 bezel insert
ProbableThe insert for the asymmetric Willard case. Original examples are scarce enough that a correct, honestly-aged insert contributes materially to value — which is the reason reproductions of it are made to a higher standard than most.
Part reference
- Brand
- Seiko
- Material
- Anodised aluminium
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
FactoryProbable1970–1977
Period printing with ageing consistent with the case and dial.
High-quality reproduction insert
AftermarketProbableWhole production
Reproductions for this reference are better executed than for the 6309, because the value gap rewards the effort. Font weight and the exact diameter of the luminous pip are the checks; an insert that looks correct but sits marginally proud of the bezel is a common tell.
Documented on these references
- Seiko 6105-8110Factory
1970–1977
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
Last verified: Not yet reviewed