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

Family line

Bulova 7AA (ETA 735)

Everything (debug)8 calibers7 lineage edges0 related edgesdesign:bulova-7aacompare specs · 8

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

Same caliber, other senses of “family”Heritage · 8 calibersParts cluster (Jules Borel sense) · 1 calibersManufacturer-internal (Ranfft sense) · 1 calibersBased-on star (WatchBase sense) · 8 calibers
100%drag to pan · ⌘/ctrl + scroll to zoom · hover a caliber to isolate its line
ébauche ofébauche ofébauche ofébauche ofébauche ofébauche ofébauche ofBulova 7AA (ETA 735) — open caliber pageBulova 7AA (ETA 735)1947maker not sourc…1 exec · grade ?Bulova 7AH (ETA 735) — open caliber pageBulova 7AH (ETA 735)1928maker not sourc…1 exec · grade ?Bulova 7AK (ETA 735) — open caliber pageBulova 7AK (ETA 735)1936maker not sourc…1 exec · grade ?Bulova 7AN (ETA 735) — open caliber pageBulova 7AN (ETA 735)—maker not sourc…1 exec · grade ?Bulova 7AP (ETA 735) — open caliber pageBulova 7AP (ETA 735)1936maker not sourc…1 exec · grade ?Dugena 839 (ETA 735) — open caliber pageDugena 839 (ETA 735)—maker not sourc…1 exec · grade ?ETA 735 — open caliber pageETA 735—ETA SA Manufacture Horlogère…1 exec · grade ?Silvana 7775 (ETA 735) — open caliber pageSilvana 7775 (ETA 735)—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 7AA (ETA 735)ébauche of
lineage
ETA 735staged—
Bulova 7AH (ETA 735)ébauche of
lineage
ETA 735staged—
Bulova 7AK (ETA 735)ébauche of
lineage
ETA 735staged—
Bulova 7AN (ETA 735)ébauche of
lineage
ETA 735staged—
Bulova 7AP (ETA 735)ébauche of
lineage
ETA 735staged—
Dugena 839 (ETA 735)ébauche of
lineage
ETA 735staged—
Silvana 7775 (ETA 735)ébauche of
lineage
ETA 735staged—

Sources

  1. 1
    Internet Archive
    https://web.archive.org/web/20230906043506/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Bulova_7AA&
    archivetier 2retrieved 2023-09-061 fact on this page
  2. 2
    Internet Archive
    https://web.archive.org/web/20181106115451/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Bulova_7AH
    archivetier 2retrieved 2018-11-061 fact on this page
  3. 3
    Internet Archive
    https://web.archive.org/web/20181106115457/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Bulova_7AK
    archivetier 2retrieved 2018-11-061 fact on this page
  4. 4
    Internet Archive
    https://web.archive.org/web/20181106115503/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Bulova_7AN
    archivetier 2retrieved 2018-11-061 fact on this page
  5. 5
    Internet Archive
    https://web.archive.org/web/20181106115509/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Bulova_7AP
    archivetier 2retrieved 2018-11-061 fact on this page
  6. 6
    Internet Archive
    https://web.archive.org/web/20230907064335/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Dugena_839&
    archivetier 2retrieved 2023-09-071 fact on this page
  7. 7
    Internet Archive
    https://web.archive.org/web/20230901232917/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Silvana_7775
    archivetier 2retrieved 2023-09-011 fact on this page