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

Family line

Bifora 8.75''' (Felsa 107)

Everything (debug)4 calibers3 lineage edges0 related edgesdesign:bifora-8-75compare specs · 4

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 · 4 calibersParts cluster (Jules Borel sense) · 1 calibersManufacturer-internal (Ranfft sense) · 1 calibersBased-on star (WatchBase sense) · 4 calibers
100%drag to pan · ⌘/ctrl + scroll to zoom · hover a caliber to isolate its line
ébauche ofébauche ofébauche ofBifora 8.75''' (Felsa 107) — open caliber pageBifora 8.75''' (Felsa 107)—maker not sourced1 exec · grade ?Felsa 107 — open caliber pageFelsa 107—Felsa SA1 exec · grade ?Silena 8.75''' (Felsa 107) — open caliber pageSilena 8.75''' (Felsa 107)—maker not sourced1 exec · grade ?ZentRa 50A (Felsa 107) — open caliber pageZentRa 50A (Felsa 107)—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
Bifora 8.75''' (Felsa 107)ébauche of
lineage
Felsa 107staged—
Silena 8.75''' (Felsa 107)ébauche of
lineage
Felsa 107staged—
ZentRa 50A (Felsa 107)ébauche of
lineage
Felsa 107staged—

Sources

  1. 1
    Internet Archive
    https://web.archive.org/web/20200918103311/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Bifora_8_75
    archivetier 2retrieved 2020-09-181 fact on this page
  2. 2
    Internet Archive
    https://web.archive.org/web/20220813123053/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&Silena_8_75&
    archivetier 2retrieved 2022-08-131 fact on this page
  3. 3
    Internet Archive
    https://web.archive.org/web/20181108110937/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&ZentRa_50A
    archivetier 2retrieved 2018-11-081 fact on this page