CALIBER/browser
CORPUS EXPORT · 12269 calibers · 59387 family views · round round/2026-09-08Compiled from app/public/data/ · corpus 70c0140eba.
Family treeETA 2801 — Heritage family: 2 calibers, 1 sourced lineage link.Drag to explore.
100%overlaydrag to pan · hover a caliber to isolate its line · scroll the page normallyopen the full family view →
ébauche ofETA 2801 — the caliber this page is aboutETA 28011971ETA SA Manufacture Horlogère…1 exec · grade ?Eterna 12801 (ETA 2801) — open caliber pageEterna 12801 (ETA 2801)—maker not sourc…1 exec · grade ?
accepteddisputed
Sense of “family”Heritage · 2Everything (debug) · 2Parts cluster (Jules Borel sense) · 1Manufacturer-internal (Ranfft sense) · 1Based-on star (WatchBase sense) · 2Open the full family view →

movement

ETA 2801

ETA SA Manufacture Horlogère Suissearchive filingintroduced 1971design:eta-2801compare specs · 2

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
ETA 2801
movementproducer: ETA SA Manufacture Horlogère Suissearchive filing
IIDesignations — 0 names

No designation is recorded for this design yet.

IIIExecutions — 1 article

No source in this corpus states which grade any ETA 2801 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:eta-2801/unknown

Specifications

PropertyValueScopeStatusSources
Jewels
build.jewel_count
17—staged
Seconds display
disp.seconds_display
central—staged
Casing diameter
geom.casing_diameter_mm
26 mm—staged
Movement diameter
geom.diameter_mm
25.6 mm—staged
Movement height
geom.height_mm
3.35 mm—staged
Frequency
osc.frequency_vph
28800 vph—staged
Shock protection
osc.shock_protection
incablocexample movement, 1995staged
Power reserve (typical)
power.reserve_typical_h
46 h—staged
Introduced
prod.intro_year
1971—staged
Hacking seconds
wind.has_hacking_seconds
yesoptional executionstaged
Winding mode
wind.mode
manual—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 · 1

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

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

ETA family/generations block
authority: ranfft12 members

Sources

  1. 1
    Internet Archive
    https://web.archive.org/web/20181107095716/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&ETA_2801
    archivetier 2retrieved 2018-11-0713 facts on this page
  2. 2
    Internet Archive
    https://web.archive.org/web/20181107095728/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&ETA_2801_2
    archivetier 2retrieved 2018-11-071 fact on this page
  3. 3
    Internet Archive
    https://web.archive.org/web/20181107095739/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&ETA_2804
    archivetier 2retrieved 2018-11-071 fact on this page
  4. 4
    Internet Archive
    https://web.archive.org/web/20181107095802/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&ETA_2806
    archivetier 2retrieved 2018-11-071 fact on this page
  5. 5
    Internet Archive
    https://web.archive.org/web/20200918112102/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Eterna_12801
    archivetier 2retrieved 2020-09-181 fact on this page