CALIBER/browser
CORPUS EXPORT · 12269 calibers · 59387 family views · round round/2026-09-08Compiled from app/public/data/ · corpus 70c0140eba.
Family treeETA 2541 — Heritage family: 9 calibers, 8 sourced lineage links.Drag to explore.
100%drag 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 ofDugena 3305 (ETA 2541) — open caliber pageDugena 3305 (ETA 254…1965maker not sourced1 exec · grade ?Dugena 781 (ETA 2541) — open caliber pageDugena 781 (ETA 254…1965maker not sourced1 exec · grade ?Dugena 784 (ETA 2541) — open caliber pageDugena 784 (ETA 254…1965maker not sourced1 exec · grade ?Enicar 761 (ETA 2541) — open caliber pageEnicar 761 (ETA 2541)—maker not sourc…1 exec · grade ?ETA 2541 — the caliber this page is aboutETA 25411965ETA SA Manufacture Horlogère…1 exec · grade ?Girard-Perregaux 84.0 (ETA 2541) — open caliber pageGirard-Perregaux 84.0 (ETA 2…1965maker not sourced1 exec · grade ?Tissot 742 (ETA 2541) — open caliber pageTissot 742 (ETA 254…1967maker not sourced1 exec · grade ?Tissot 762 (ETA 2541) — open caliber pageTissot 762 (ETA 254…1968maker not sourced1 exec · grade ?Zodiac 44 (ETA 2541) — open caliber pageZodiac 44 (ETA 2541)1965maker not sourc…1 exec · grade ?
accepteddisputed
Sense of “family”Heritage · 9Everything (debug) · 9Parts cluster (Jules Borel sense) · 1Manufacturer-internal (Ranfft sense) · 1Based-on star (WatchBase sense) · 9Open the full family view →

movement

ETA 2541

ETA SA Manufacture Horlogère Suissearchive filingintroduced 1965design:eta-2541compare specs · 8
bounding evidence — no range is drawn on the era axis
not after 1972
a dated example movement, 1972“1972: 14518705, Chs. Tissot & Fils, Swiss, 17 Jewels - 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 2541
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 2541 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-2541/unknown

Specifications

PropertyValueScopeStatusSources
Jewels
build.jewel_count
17—staged
Date correction
disp.date_quickset
none—staged
Date
disp.has_date
yes—staged
Seconds display
disp.seconds_display
central—staged
Casing diameter
geom.casing_diameter_mm
17.5 mm—staged
Movement diameter
geom.diameter_mm
17.2 mm—staged
Movement height
geom.height_mm
3.3 mm—staged
Frequency
osc.frequency_vph
21600 vph—staged
Shock protection
osc.shock_protection
incablocexample movement, 1972staged
Power reserve (typical)
power.reserve_typical_h
44 h—staged
Discontinued
prod.discontinued_year
1972—staged
Introduced
prod.intro_year
1965—staged
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.

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/20181107094041/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&ETA_2541
    archivetier 2retrieved 2018-11-0715 facts on this page
  2. 2
    Internet Archive
    https://web.archive.org/web/20191114131758/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Dugena_3305
    archivetier 2retrieved 2019-11-141 fact on this page
  3. 3
    Internet Archive
    https://web.archive.org/web/20230907063300/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Dugena_781&
    archivetier 2retrieved 2023-09-071 fact on this page
  4. 4
    Internet Archive
    https://web.archive.org/web/20181106140121/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Dugena_784
    archivetier 2retrieved 2018-11-061 fact on this page
  5. 5
    Internet Archive
    https://web.archive.org/web/20181106152619/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Enicar_761
    archivetier 2retrieved 2018-11-061 fact on this page
  6. 6
    Internet Archive
    https://web.archive.org/web/20200930020438/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Girard-Perregaux_84_0
    archivetier 2retrieved 2020-09-301 fact on this page
  7. 7
    Internet Archive
    https://web.archive.org/web/20220528231111/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&Tissot_742
    archivetier 2retrieved 2022-05-281 fact on this page
  8. 8
    Internet Archive
    https://web.archive.org/web/20181108074252/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Tissot_762
    archivetier 2retrieved 2018-11-081 fact on this page
  9. 9
    Internet Archive
    https://web.archive.org/web/20181108111433/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Zodiac_44
    archivetier 2retrieved 2018-11-081 fact on this page