CALIBER/browser
CORPUS EXPORT · 12269 calibers · 59387 family views · round round/2026-09-08Compiled from app/public/data/ · corpus 70c0140eba.
Family treeETA 2412 — Heritage family: 12 calibers, 12 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 ofébauche ofébauche ofébauche ofébauche ofébauche ofébauche ofébauche ofébauche ofébauche ofDugena 1201 (ETA 2412) — open caliber pageDugena 1201 (ETA 2412)—maker not sourc…1 exec · grade ?Dugena 1207 (Helvetia 132, ETA 2412) — open caliber pageDugena 1207 (Helvetia 132, ETA …—maker not sourced1 exec · grade ?ETA 2412 — the caliber this page is aboutETA 24121955ETA SA Manufacture Horlogère…1 exec · grade ?Favre-Leuba 616 (ETA 2412) — open caliber pageFavre-Leuba 616 (ETA 2412)—maker not sourced1 exec · grade ?Hamilton 23 (ETA 2412) — open caliber pageHamilton 23 (ETA 2412)—maker not sourc…1 exec · grade ?Hamilton 231 (ETA 2412) — open caliber pageHamilton 231 (ETA 2412)—maker not sourc…1 exec · grade ?Hamilton 232 (ETA 2412) — open caliber pageHamilton 232 (ETA 2412)—maker not sourc…1 exec · grade ?Helvetia 132 (ETA 2412) — open caliber pageHelvetia 132 (ETA 2412)—maker not sourc…1 exec · grade ?Junghans 640.01 (ETA 2412) — open caliber pageJunghans 640.01 (ETA 2412)—maker not sourced1 exec · grade ?Tudor 2411 (ETA 2412) — open caliber pageTudor 2411 (ETA 2412)—maker not sourc…1 exec · grade ?Tudor 2424 (ETA 2412) — open caliber pageTudor 2424 (ETA 2412)—maker not sourc…1 exec · grade ?Zodiac 19 (ETA 2412) — open caliber pageZodiac 19 (ETA 2412)—maker not sourc…1 exec · grade ?
accepteddisputed
Sense of “family”Heritage · 12Everything (debug) · 12Parts cluster (Jules Borel sense) · 1Manufacturer-internal (Ranfft sense) · 1Based-on star (WatchBase sense) · 12Open the full family view →

movement

ETA 2412

ETA SA Manufacture Horlogère Suissearchive filingintroduced 1955design:eta-2412compare specs · 8
bounding evidence — no range is drawn on the era axis
not after 1960
a dated example movement, ca. 1955 (+5 yr, the source says “circa”)“1-2) ca. 1955: - DMG, Patented; Incabloc”
not after 1965
a dated example movement, ca. 1960 (+5 yr, the source says “circa”)“3-4) ca. 1960: Swiss, 17 Jewels - UT, Patented; Incabloc”
not after 1970
a dated example movement, ca. 1965 (+5 yr, the source says “circa”)“5-6) ca. 1965: ZentRa - Patented; Incabloc”

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 2412
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 2412 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-2412/unknown

Specifications

PropertyValueScopeStatusSources
Jewels
build.jewel_count
17Ranfft data sheet, the 17-jewel member of its 17/19/21 rangestaged
Jewels
build.jewel_count
19Ranfft data sheet, the 19-jewel member of its 17/19/21 rangestaged
Jewels
build.jewel_count
21Ranfft data sheet, the 21-jewel member of its 17/19/21 rangestaged
Casing diameter
geom.casing_diameter_mm
15.55 mm—staged
Movement diameter
geom.diameter_mm
15.3 mm—staged
Movement height
geom.height_mm
3.4 mm—staged
Frequency
osc.frequency_vph
21600 vph—staged
Shock protection
osc.shock_protection
incablocexample movement, 1955staged
Shock protection
osc.shock_protection
incablocexample movement, 1960staged
Shock protection
osc.shock_protection
incablocexample movement, 1965staged
Power reserve (typical)
power.reserve_typical_h
40 h—staged
Introduced
prod.intro_year
1955—staged
Winding mode
wind.mode
manual—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.

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/20220528131549/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&ETA_2412
    archivetier 2retrieved 2022-05-2817 facts on this page
  2. 2
    Internet Archive
    https://web.archive.org/web/20230907000540/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Dugena_1201&
    archivetier 2retrieved 2023-09-071 fact on this page
  3. 3
    Internet Archive
    https://web.archive.org/web/20230907000756/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Dugena_1207&
    archivetier 2retrieved 2023-09-072 facts on this page
  4. 4
    Internet Archive
    https://web.archive.org/web/20191021133743/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Favre-Leuba_616
    archivetier 2retrieved 2019-10-211 fact on this page
  5. 5
    Internet Archive
    https://web.archive.org/web/20191120033511/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Hamilton_23
    archivetier 2retrieved 2019-11-201 fact on this page
  6. 6
    Internet Archive
    https://web.archive.org/web/20211020163835/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Hamilton_231&
    archivetier 2retrieved 2021-10-201 fact on this page
  7. 7
    Internet Archive
    https://web.archive.org/web/20181107162420/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Hamilton_232
    archivetier 2retrieved 2018-11-071 fact on this page
  8. 8
    Internet Archive
    https://web.archive.org/web/20191119132800/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Helvetia_132
    archivetier 2retrieved 2019-11-191 fact on this page
  9. 9
    Internet Archive
    https://web.archive.org/web/20230901141226/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Junghans_640_01
    archivetier 2retrieved 2023-09-011 fact on this page
  10. 10
    Internet Archive
    https://web.archive.org/web/20230902002101/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Tudor_2411
    archivetier 2retrieved 2023-09-021 fact on this page
  11. 11
    Internet Archive
    https://web.archive.org/web/20230902002210/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Tudor_2424
    archivetier 2retrieved 2023-09-021 fact on this page
  12. 12
    Internet Archive
    https://web.archive.org/web/20210416175113/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&220&2uswk&Zodiac_19&
    archivetier 2retrieved 2021-04-161 fact on this page