CALIBER/browser
CORPUS EXPORT · 12269 calibers · 59387 family views · round round/2026-09-08Compiled from app/public/data/ · corpus 70c0140eba.

Family tree · none recorded

No lineage link to any other caliber is recorded for this design under the Heritage profile. That is a gap in the research, not a claim that none exists.

Open the full family view →

movement

Seiko NH35 / 4R35

Seiko Instruments Inc. (SII)introduced 2011design:seiko-nh35-4r35compare specs

Identity

A caliber is three separate things and this reference keeps them apart: the construction, the names it is sold under, and the article a brand actually bought. A watch model points at an execution — never at a bare construction — which is why “same caliber” is almost never a complete answer.

IDesign — the construction
Seiko NH35 / 4R35
movementproducer: Seiko Instruments Inc. (SII)
IIDesignations — 2 names
IssuerNameKindDisambiguated bySources
Seiko Instruments Inc. (SII)NH35Achannel—
Seiko Watch Corporation4R35house—
IIIExecutions — 1 article

No source in this corpus states which grade any Seiko NH35 / 4R35 was bought at. That unknown is stored as a real row rather than left blank, so it can be counted, filtered and excluded from any comparison that would otherwise assume parity.

unknownsynthetic
evidence: unknown

no source states which grade this article was bought at — this row exists so 'unknown' stays countable instead of becoming an assumption

exec:seiko-nh35-4r35/unknown

Specifications

PropertyValueScopeStatusSources
Jewels
build.jewel_count
24NH35A, per spec sheetaccepted
Jewels
build.jewel_count
234R35B, as marked on observed rotorsaccepted
Date
disp.has_date
yes—accepted
Frequency
osc.frequency_vph
21600 vph—accepted
Power reserve (typical)
power.reserve_typical_h
41 h—accepted
Introduced
prod.intro_year
2011—staged

Where a property carries more than one value, the values have different scopes — an official spec sheet and observed hardware, say. Different scopes are not a disagreement, so both are accepted and both are shown with the scope they apply to.

Lineage

The same relationships as the tree at the top of this page, with their sources. An absence in a column means no source stated one.

Ancestors · 0

Where this construction came from. Read up the arrows.

None recorded. An absence here means no source stated one, not that none exists.

Descendants · 0

What came from it — revisions, variants, clones, licensed copies.

None recorded. An absence here means no source stated one, not that none exists.

Related · 0

Stored in a different table from descent. A successor is not a child.

None recorded. An absence here means no source stated one, not that none exists.

Used by

16
models
13
brands
16
grade unknown

grain 1 family · 13 model · 2 reference — the count above mixes levels. A family record is one the source states a movement for family-wide; a reference record is one case reference. They are not the same unit and are never summed silently.

Every brand here is on the strength of a source that names a watch and states this movement. Brands that use this caliber and nobody has sourced yet are absent — this is what has been researched, not what exists.

Sources

  1. 1
    Seiko Time Module Inc.
    https://www.timemodule.com/en/
    manufacturertier 1retrieved 2026-08-241 fact on this page
  2. 2
    Caliber Corner
    https://calibercorner.com/seiko-caliber-nh35/
    curated dbtier 2retrieved 2026-08-246 facts on this pagecited, never crawled
  3. 3
    Caliber Corner
    https://calibercorner.com/seiko-caliber-4r35/
    curated dbtier 2retrieved 2026-08-243 facts on this pagecited, never crawled