CALIBER/browser
CORPUS EXPORT · 12269 calibers · 59387 family views · round round/2026-09-08Compiled from app/public/data/ · corpus 70c0140eba.
Family treeTissot 2391 (ETA 2678) — Heritage family: 6 calibers, 5 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 ofDugena 3358 (ETA 2678) — open caliber pageDugena 3358 (ETA 2678)—maker not sourc…1 exec · grade ?ETA 2678 — open caliber pageETA 26781971ETA SA Manufacture Horlogère…1 exec · grade ?Eterna 12678 (ETA 2678) — open caliber pageEterna 12678 (ETA 267…1970maker not sourced1 exec · grade ?Mido 757CD (ETA 2678) — open caliber pageMido 757CD (ETA 267…1971maker not sourced1 exec · grade ?Tissot 2341 (ETA 2678) — open caliber pageTissot 2341 (ETA 267…1972maker not sourced1 exec · grade ?Tissot 2391 (ETA 2678) — the caliber this page is aboutTissot 2391 (ETA 267…1972maker not sourced1 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

Tissot 2391 (ETA 2678)

maker not sourcedintroduced 1972design:tissot-2391compare specs · 2
bounding evidence — no range is drawn on the era axis
not after 2000
a dated example movement, 2000“2000: Swiss Made, 21 Jewels; 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
Tissot 2391 (ETA 2678)
movement
IIDesignations — 0 names

No designation is recorded for this design yet.

IIIExecutions — 1 article

No source in this corpus states which grade any Tissot 2391 (ETA 2678) 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:tissot-2391/unknown

Specifications

PropertyValueScopeStatusSources
Jewels
build.jewel_count
21—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
17.5 mm—staged
Movement diameter
geom.diameter_mm
17.2 mm—staged
Movement height
geom.height_mm
5.35 mm—staged
Frequency
osc.frequency_vph
28800 vph—staged
Shock protection
osc.shock_protection
incablocexample movement, 2000staged
Power reserve (typical)
power.reserve_typical_h
39 h—staged
Introduced
prod.intro_year
1972—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/20181108071954/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Tissot_2391
    archivetier 2retrieved 2018-11-0815 facts on this page
  2. 2
    Internet Archive
    https://web.archive.org/web/20181106134633/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Dugena_3358
    archivetier 2retrieved 2018-11-061 fact on this page
  3. 3
    Internet Archive
    https://web.archive.org/web/20181107105053/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Eterna_12678
    archivetier 2retrieved 2018-11-071 fact on this page
  4. 4
    Internet Archive
    https://web.archive.org/web/20230901172920/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Mido_757CD
    archivetier 2retrieved 2023-09-011 fact on this page
  5. 5
    Internet Archive
    https://web.archive.org/web/20181108071858/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Tissot_2341
    archivetier 2retrieved 2018-11-081 fact on this page