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 4206B

Seiko Watch Corporationarchive filingyear not sourceddesign:seiko-4206bcompare 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 4206B
movementproducer: Seiko Watch Corporationarchive filing
IIDesignations — 0 names

No designation is recorded for this design yet.

IIIExecutions — 1 article

No source in this corpus states which grade any Seiko 4206B 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-4206b/unknown

Specifications

PropertyValueScopeStatusSources
Jewels
build.jewel_count
17—staged
Date correction
disp.date_quickset
crown—staged
Date
disp.has_date
yes—staged
Day
disp.has_day
yes—staged
Seconds display
disp.seconds_display
central—staged
Movement diameter
geom.diameter_mm
17.2 mm—staged
Movement height
geom.height_mm
5.5 mm—staged
Frequency
osc.frequency_vph
21600 vph—staged
Winding mode
wind.mode
automatic—staged

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.

Curated family labels

Seiko family/generations block
authority: ranfft5 members

Sources

  1. 1
    Internet Archive
    https://web.archive.org/web/20171031022742/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&179&2uswk&Seiko_4206B
    archivetier 2retrieved 2017-10-3110 facts on this page
  2. 2
    Internet Archive
    https://web.archive.org/web/20171031022736/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&179&2uswk&Seiko_4205A
    archivetier 2retrieved 2017-10-311 fact on this page
  3. 3
    Internet Archive
    https://web.archive.org/web/20171031022738/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&179&2uswk&Seiko_4205B
    archivetier 2retrieved 2017-10-311 fact on this page
  4. 4
    Internet Archive
    https://web.archive.org/web/20171031022740/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&179&2uswk&Seiko_4206A
    archivetier 2retrieved 2017-10-311 fact on this page
  5. 5
    Internet Archive
    https://web.archive.org/web/20230901231125/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Seiko_4207B
    archivetier 2retrieved 2023-09-011 fact on this page