CALIBER/browser
CORPUS EXPORT · 12269 calibers · 59387 family views · round round/2026-09-08Compiled from app/public/data/ · corpus 70c0140eba.
Family treeETA 2502 — Heritage family: 6 calibers, 6 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 ofDugena 1069 (Helvetia 871, ETA 2502) — open caliber pageDugena 1069 (Helvetia 871, ETA …—maker not sourced1 exec · grade ?Dugena 993 (ETA 2502) — open caliber pageDugena 993 (ETA 2502)—maker not sourc…1 exec · grade ?Enicar 1171 (ETA 2502) — open caliber pageEnicar 1171 (ETA 2502)—maker not sourc…1 exec · grade ?Enicar 171 (ETA 2502) — open caliber pageEnicar 171 (ETA 2502)—maker not sourc…1 exec · grade ?ETA 2502 — the caliber this page is aboutETA 2502—ETA SA Manufacture Horlogère…1 exec · grade ?Helvetia 871 (ETA 2502) — open caliber pageHelvetia 871 (ETA 2502)—maker not sourc…1 exec · grade ?
accepteddisputed
Sense of “family”Heritage · 6Everything (debug) · 6Parts cluster (Jules Borel sense) · 1Manufacturer-internal (Ranfft sense) · 1Based-on star (WatchBase sense) · 6Open the full family view →

movement

ETA 2502

ETA SA Manufacture Horlogère Suissearchive filingyear not sourceddesign:eta-2502compare specs · 6

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 2502
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 2502 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-2502/unknown

Specifications

PropertyValueScopeStatusSources
Jewels
build.jewel_count
17Ranfft data sheet, the 17-jewel member of its 17/21 rangestaged
Jewels
build.jewel_count
21Ranfft data sheet, the 21-jewel member of its 17/21 rangestaged
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
26 mm—staged
Movement diameter
geom.diameter_mm
25.6 mm—staged
Movement height
geom.height_mm
3.25 mm—staged
Frequency
osc.frequency_vph
18000 vph—staged
Shock protection
osc.shock_protection
incablocexample movement, 1960staged
Power reserve (typical)
power.reserve_typical_h
48 h—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.

Curated family labels

ETA family/generations block
authority: ranfft55 members

Sources

  1. 1
    Internet Archive
    https://web.archive.org/web/20181107093503/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&ETA_2502
    archivetier 2retrieved 2018-11-0713 facts on this page
  2. 2
    Internet Archive
    https://web.archive.org/web/20191114092249/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&ETA_2722R
    archivetier 2retrieved 2019-11-141 fact on this page
  3. 3
    Internet Archive
    https://web.archive.org/web/20191117152623/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&ETA_2724R
    archivetier 2retrieved 2019-11-171 fact on this page
  4. 4
    Internet Archive
    https://web.archive.org/web/20201027030100/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&ETA_2520R
    archivetier 2retrieved 2020-10-271 fact on this page
  5. 5
    Internet Archive
    https://web.archive.org/web/20211206083556/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&ETA_2522
    archivetier 2retrieved 2021-12-061 fact on this page
  6. 6
    Internet Archive
    https://web.archive.org/web/20191021225816/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Dugena_1069
    archivetier 2retrieved 2019-10-212 facts on this page
  7. 7
    Internet Archive
    https://web.archive.org/web/20230907071929/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Dugena_993&
    archivetier 2retrieved 2023-09-071 fact on this page
  8. 8
    Internet Archive
    https://web.archive.org/web/20171030192718/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&68&2uswk&Enicar_1171
    archivetier 2retrieved 2017-10-301 fact on this page
  9. 9
    Internet Archive
    https://web.archive.org/web/20181106152437/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Enicar_171
    archivetier 2retrieved 2018-11-061 fact on this page
  10. 10
    Internet Archive
    https://web.archive.org/web/20181107170208/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Helvetia_871
    archivetier 2retrieved 2018-11-071 fact on this page