Seiko 35A (Astron)
High confidenceHistorically the most significant movement in this catalog. Detailed specification here is deliberately sparse: the figures in circulation vary between accounts and the caliber warrants primary-source verification against Seiko's own archive before more is asserted about it.
Specifications
- Movement manufacturer
- Seiko
- Production
- 1969–1970
- Winding
- quartz
- Complications
- Date
Architecture
The quartz caliber of the 1969 Astron: a 8,192 Hz quartz oscillator driving an open type step motor, in the first production quartz wristwatch.
References using this caliber
- Seiko 35SQ AstronFactory
Astron · 1969–1970
Provenance of this record
Sources & Evidence
Primary sourceManufacturer archive
The Seiko Museum Ginza — company history and milestone exhibits
Seiko Group Corporation
- Accessed
- 2026-08-18
Cited for
This referenceHigh confidence
Last verified: Not yet reviewed