CALIBER/browser
CORPUS EXPORT · 12269 calibers · 59387 family views · round round/2026-09-08Compiled from app/public/data/ · corpus 70c0140eba.

Family line

ETA 2520

Based-on star (WatchBase sense)3 calibers2 lineage edges0 related edgesdesign:eta-2520compare specs · 3

This profile traverses clone_of · derived_from · ebauche_of · revision_of · variant_of and keeps disputed edges. Every edge in this view carries at least one reference.

Same caliber, other senses of “family”Everything (debug) · 3 calibersHeritage · 3 calibersParts cluster (Jules Borel sense) · 1 calibersManufacturer-internal (Ranfft sense) · 1 calibers
100%overlaydrag to pan · ⌘/ctrl + scroll to zoom · hover a caliber to isolate its line
ébauche ofébauche ofETA 2520 — open caliber pageETA 2520—ETA SA Manufacture Horlogère…1 exec · grade ?Hamilton 623 (ETA 2520) — open caliber pageHamilton 623 (ETA 2520)—maker not sourc…1 exec · grade ?Hamilton 73 (ETA 2520) — open caliber pageHamilton 73 (ETA 2520)—maker not sourc…1 exec · grade ?
Edge types in this family
accepteddisputedcontested region

Generations run left to right, ancestors first, and the axis along the top is ordinal rather than linear: each band is one generation, labelled with the range of sourced introduction years it contains. A band reads “—” when no caliber in it has a year anyone published — the gap is the finding, not a rendering failure. Dotted arcs above and below the drawing are related edges — successor, drop-in, no-derivation — which are stored in a different table from lineage and can never form part of an ancestry path.

Every edge in this view

CaliberRelationshipToStatusDetailSources
Hamilton 623 (ETA 2520)ébauche of
lineage
ETA 2520staged—
Hamilton 73 (ETA 2520)ébauche of
lineage
ETA 2520staged—

Curated overlays

A curated family label is an attributed opinion about grouping, not a node in the graph. No edge can point at one, and membership never affects ancestry.

ETA family/generations block
authority: ranfft55 members

Sources

  1. 1
    Internet Archive
    https://web.archive.org/web/20181107162731/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Hamilton_623
    archivetier 2retrieved 2018-11-071 fact on this page
  2. 2
    Internet Archive
    https://web.archive.org/web/20181107163105/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Hamilton_73
    archivetier 2retrieved 2018-11-071 fact on this page
  3. 3
    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
  4. 4
    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
  5. 5
    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
  6. 6
    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