CALIBER/browser
CORPUS EXPORT · 12269 calibers · 59387 family views · round round/2026-09-08Compiled from app/public/data/ · corpus 70c0140eba.
Family treeJuvenia 765 (ETA 2510) — 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 774 (ETA 2510) — open caliber pageDugena 774 (ETA 251…1959maker not sourced1 exec · grade ?ETA 2510 — open caliber pageETA 25101959ETA SA Manufacture Horlogère…1 exec · grade ?Junghans 640.03 (ETA 2510) — open caliber pageJunghans 640.03 (ETA 2510)—maker not sourced1 exec · grade ?Juvenia 765 (ETA 2510) — the caliber this page is aboutJuvenia 765 (ETA 2510)—maker not sourc…1 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

Juvenia 765 (ETA 2510)

maker not sourcedyear not sourceddesign:juvenia-765compare specs · 2
bounding evidence — no range is drawn on the era axis
not after 1965
a dated example movement, ca. 1960 (+5 yr, the source says “circa”)“ca. 1960: Juvenia Mfg, 765, Fab. Swiss, 17 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
Juvenia 765 (ETA 2510)
movement
IIDesignations — 0 names

No designation is recorded for this design yet.

IIIExecutions — 1 article

No source in this corpus states which grade any Juvenia 765 (ETA 2510) 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:juvenia-765/unknown

Specifications

PropertyValueScopeStatusSources
Jewels
build.jewel_count
17—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
2.85 mm—staged
Frequency
osc.frequency_vph
18000 vph—staged
Shock protection
osc.shock_protection
incablocexample movement, 1960staged
Power reserve (typical)
power.reserve_typical_h
44 h—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 · 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/20171030231213/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&131&2uswk&Juvenia_765
    archivetier 2retrieved 2017-10-3010 facts on this page
  2. 2
    Internet Archive
    https://web.archive.org/web/20191122065622/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Dugena_774
    archivetier 2retrieved 2019-11-221 fact on this page
  3. 3
    Internet Archive
    https://web.archive.org/web/20191114061542/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Junghans_640_03
    archivetier 2retrieved 2019-11-141 fact on this page