CALIBER/browser
CORPUS EXPORT · 12269 calibers · 59387 family views · round round/2026-09-08Compiled from app/public/data/ · corpus 70c0140eba.
Family treeJunghans 660.70 (ETA 2440) — Heritage family: 3 calibers, 2 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 ofDugena 1210 (ETA 2440) — open caliber pageDugena 1210 (ETA 2440)—maker not sourc…1 exec · grade ?ETA 2440 — open caliber pageETA 2440—ETA SA Manufacture Horlogère…1 exec · grade ?Junghans 660.70 (ETA 2440) — the caliber this page is aboutJunghans 660.70 (ETA 244…1963maker not sourced1 exec · grade ?
accepteddisputed
Sense of “family”Heritage · 3Everything (debug) · 3Parts cluster (Jules Borel sense) · 1Manufacturer-internal (Ranfft sense) · 1Based-on star (WatchBase sense) · 3Open the full family view →

movement

Junghans 660.70 (ETA 2440)

maker not sourcedintroduced 1963design:junghans-660-70compare specs · 2

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
Junghans 660.70 (ETA 2440)
movement
IIDesignations — 0 names

No designation is recorded for this design yet.

IIIExecutions — 1 article

No source in this corpus states which grade any Junghans 660.70 (ETA 2440) 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:junghans-660-70/unknown

Specifications

PropertyValueScopeStatusSources
Jewels
build.jewel_count
17—staged
Casing diameter
geom.casing_diameter_mm
13.75 mm—staged
Movement diameter
geom.diameter_mm
13.5 mm—staged
Movement height
geom.height_mm
3.2 mm—staged
Frequency
osc.frequency_vph
18000 vph—staged
Power reserve (typical)
power.reserve_typical_h
41 h—staged
Discontinued
prod.discontinued_year
1988—staged
Introduced
prod.intro_year
1963—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/20230901141458/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Junghans_660_70
    archivetier 2retrieved 2023-09-0110 facts on this page
  2. 2
    Internet Archive
    https://web.archive.org/web/20181106133206/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Dugena_1210
    archivetier 2retrieved 2018-11-061 fact on this page