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

Family line

Bulova 8AD (ETA 1220)

Based-on star (WatchBase sense)4 calibers3 lineage edges0 related edgesdesign:bulova-8adcompare specs · 4

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) · 4 calibersHeritage · 4 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 ofébauche ofBulova 8AD (ETA 1220) — open caliber pageBulova 8AD (ETA 122…1948maker not sourced1 exec · grade ?Bulova 8BA (ETA 1220) — open caliber pageBulova 8BA (ETA 122…1947maker not sourced1 exec · grade ?ETA 1220 — open caliber pageETA 12201947ETA SA Manufacture Horlogère…1 exec · grade ?Wyler E1220 (ETA 1220) — open caliber pageWyler E1220 (ETA 1220)—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
Bulova 8AD (ETA 1220)ébauche of
lineage
ETA 1220staged—
Bulova 8BA (ETA 1220)ébauche of
lineage
ETA 1220staged—
Wyler E1220 (ETA 1220)ébauche of
lineage
ETA 1220staged—

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.

Sources

  1. 1
    Internet Archive
    https://web.archive.org/web/20230906044753/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Bulova_8AD&
    archivetier 2retrieved 2023-09-061 fact on this page
  2. 2
    Internet Archive
    https://web.archive.org/web/20181106115552/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Bulova_8BA
    archivetier 2retrieved 2018-11-061 fact on this page
  3. 3
    Internet Archive
    https://web.archive.org/web/20230902013028/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Wyler_E1220
    archivetier 2retrieved 2023-09-021 fact on this page
  4. 4
    Internet Archive
    https://web.archive.org/web/20191117165916/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&ETA_1060
    archivetier 2retrieved 2019-11-171 fact on this page
  5. 5
    Internet Archive
    https://web.archive.org/web/20191120175814/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&ETA_1007
    archivetier 2retrieved 2019-11-201 fact on this page
  6. 6
    Internet Archive
    https://web.archive.org/web/20191121011832/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&ETA_969
    archivetier 2retrieved 2019-11-211 fact on this page
  7. 7
    Internet Archive
    https://web.archive.org/web/20191121065128/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&ETA_1008
    archivetier 2retrieved 2019-11-211 fact on this page