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

Family line

Dugena 3911 (Unitas 6497)

Everything (debug)7 calibers6 lineage edges0 related edgesdesign:dugena-3911compare specs · 7

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 · 7 calibersParts cluster (Jules Borel sense) · 1 calibersManufacturer-internal (Ranfft sense) · 1 calibersBased-on star (WatchBase sense) · 7 calibers
100%drag to pan · ⌘/ctrl + scroll to zoom · hover a caliber to isolate its line
clone ofclone ofvariant ofébauche ofébauche ofébauche ofDugena 3911 (Unitas 6497) — open caliber pageDugena 3911 (Unitas 649…1950maker not sourced1 exec · grade ?Dugena 3913 (Unitas 6498) — open caliber pageDugena 3913 (Unitas 649…1950maker not sourced1 exec · grade ?Hangzhou 9000 series — open caliber pageHangzhou 9000 series—Hangzhou Watch Facto…1 exec · grade ?Omega 960 (Unitas 6497) — open caliber pageOmega 960 (Unitas 6497)—maker not sourc…1 exec · grade ?Sea-Gull ST36 — open caliber pageSea-Gull ST36—Tianjin Sea-Gull Watch Group1 exec · grade ?Unitas / ETA 6497 — open caliber pageUnitas / ETA 64971950ETA SA Manufacture Horlogère…1 exec · grade ?Unitas / ETA 6498 — open caliber pageUnitas / ETA 6498—ETA SA Manufacture Horlogère…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
Hangzhou 9000 seriesclone of
lineage
Unitas / ETA 6497acceptedtrue clone
Sea-Gull ST36clone of
lineage
Unitas / ETA 6497acceptedtrue clone
Unitas / ETA 6498variant of
lineage
Unitas / ETA 6497acceptedinterchange note: Lépine versus Savonette layout; the small-seconds position differs · component delta: bridges
Dugena 3911 (Unitas 6497)ébauche of
lineage
Unitas / ETA 6497staged—
Dugena 3913 (Unitas 6498)ébauche of
lineage
Unitas / ETA 6498staged—
Omega 960 (Unitas 6497)ébauche of
lineage
Unitas / ETA 6497staged—

Sources

  1. 1
    chinesewatchwiki.net
    https://chinesewatchwiki.net/Clone_movements
    wikitier 3retrieved 2026-08-242 facts on this page
  2. 2
    Caliber Corner
    https://calibercorner.com/eta-unitas-caliber-6497-vs-6498/
    curated dbtier 2retrieved 2026-08-241 fact on this pagecited, never crawled
  3. 3
    Monochrome Watches
    https://monochrome-watches.com/history-eta-unitas-6497-and-6498-hand-wound-lepine-savonette-movements-technical-guide/
    presstier 2retrieved 2026-08-241 fact on this page
  4. 4
    Internet Archive
    https://web.archive.org/web/20181106134924/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Dugena_3911
    archivetier 2retrieved 2018-11-061 fact on this page
  5. 5
    Internet Archive
    https://web.archive.org/web/20181106134936/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Dugena_3913
    archivetier 2retrieved 2018-11-061 fact on this page
  6. 6
    Internet Archive
    https://web.archive.org/web/20171119001912/http://www.ranfft.de:80/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&Omega_960
    archivetier 2retrieved 2017-11-191 fact on this page