CALIBER/browser
CORPUS EXPORT · 12269 calibers · 59387 family views · round round/2026-09-08Compiled from app/public/data/ · corpus 70c0140eba.
Family treeEterna 12836 (ETA 2836) — Heritage family: 4 calibers, 3 sourced lineage links.Drag to explore.
100%overlaydrag to pan · hover a caliber to isolate its line · scroll the page normallyopen the full family view →
ébauche ofébauche ofébauche ofDugena 3360 (ETA 2836) — open caliber pageDugena 3360 (ETA 2836)—maker not sourc…1 exec · grade ?ETA 2836 — open caliber pageETA 28361974ETA SA Manufacture Horlogère…1 exec · grade ?Eterna 12836 (ETA 2836) — the caliber this page is aboutEterna 12836 (ETA 283…1975maker not sourced1 exec · grade ?Longines 636.1 (ETA 2836) — open caliber pageLongines 636.1 (ETA 283…1974maker not sourced1 exec · grade ?
accepteddisputed
Sense of “family”Heritage · 4Everything (debug) · 4Parts cluster (Jules Borel sense) · 1Manufacturer-internal (Ranfft sense) · 1Based-on star (WatchBase sense) · 4Open the full family view →

movement

Eterna 12836 (ETA 2836)

maker not sourcedintroduced 1975design:eterna-12836compare 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
Eterna 12836 (ETA 2836)
movement
IIDesignations — 0 names

No designation is recorded for this design yet.

IIIExecutions — 1 article

No source in this corpus states which grade any Eterna 12836 (ETA 2836) 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:eterna-12836/unknown

Specifications

PropertyValueScopeStatusSources
Jewels
build.jewel_count
25—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
Casing diameter
geom.casing_diameter_mm
26 mm—staged
Movement diameter
geom.diameter_mm
25.6 mm—staged
Movement height
geom.height_mm
5.1 mm—staged
Frequency
osc.frequency_vph
28800 vph—staged
Shock protection
osc.shock_protection
kifexample movement, 1975staged
Power reserve (typical)
power.reserve_typical_h
40 h—staged
Introduced
prod.intro_year
1975—staged
Hacking seconds
wind.has_hacking_seconds
yes—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 · 1

Where this construction came from. Read up the arrows.

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.

Sources

  1. 1
    Internet Archive
    https://web.archive.org/web/20191021052421/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Eterna_12836
    archivetier 2retrieved 2019-10-2115 facts on this page
  2. 2
    Internet Archive
    https://web.archive.org/web/20230907031528/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Dugena_3360&
    archivetier 2retrieved 2023-09-071 fact on this page
  3. 3
    Internet Archive
    https://web.archive.org/web/20171031000438/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&143&2uswk&Longines_636_1
    archivetier 2retrieved 2017-10-311 fact on this page