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Seiko 6105A

Probable

The earlier 6105 execution, fitted to the symmetric-cased 6105-8000. Whether the A and B designations correspond to a hacking capability, a date-quickset change or a purely constructional revision is not established here from Seiko documentation and is tracked as an open question.

Specifications

Movement manufacturer
Seiko
Production
1968–1970
Frequency
21,600 vph (3 Hz)
Winding
automatic
Complications
Date

Architecture

Automatic diver's caliber with a date.

Related calibers

  • Preceded by

    Seiko 6105B

    Fitted to the later asymmetric-cased 6105-8110 and -8119.

References using this caliber

Provenance of this record

Sources & Evidence

Primary sourceTechnical documentation

Seiko caliber technical guides and parts catalogues

Seiko Watch Corporation / Seiko Instruments

Accessed
2026-08-18

Cited for

This referenceProbable

Last verified: Not yet reviewed