CALIBER/browser
CORPUS EXPORT · 12269 calibers · 59387 family views · round round/2026-09-08Compiled from app/public/data/ · corpus 70c0140eba.
Family treeUnitas / ETA 6498 — Heritage family: 7 calibers, 6 sourced lineage links.Drag to explore.
100%drag to pan · hover a caliber to isolate its line · scroll the page normallyopen the full family view →
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 — the caliber this page is aboutUnitas / ETA 6498—ETA SA Manufacture Horlogère…1 exec · grade ?
accepteddisputed
Sense of “family”Heritage · 7Everything (debug) · 7Parts cluster (Jules Borel sense) · 1Manufacturer-internal (Ranfft sense) · 2Based-on star (WatchBase sense) · 7Open the full family view →

movement

Unitas / ETA 6498

ETA SA Manufacture Horlogère Suisse · 1983–presentETA SA Manufacture Horlogère SuisseFabrique d'Ebauches Unitas SA · ?–1983⟨1950–1990⟩ range onlydesign:unitas-6498compare specs · 3
⟨1950–1990⟩ range only — no source gives an introduction yearsources and dated relatives · staged
not after 1990
a dated example movement, ca. 1985 (+5 yr, the source says “circa”)“ca. 1985: MB, Swiss, 17 Jewels; Novodiac”
not before 1950
Unitas / ETA 6497 · introduced 1950 (sourced)a variant is defined relative to a base that exists first · ← variant of · rule IR-5 · depth 1 · acceptedthe anchor's own source

Identity

A caliber is three separate things and this reference keeps them apart: the construction, the names it is sold under, and the article a brand actually bought. A watch model points at an execution — never at a bare construction — which is why “same caliber” is almost never a complete answer.

IDesign — the construction
Unitas / ETA 6498
movementproducer: ETA SA Manufacture Horlogère Suisseproducer: ETA SA Manufacture Horlogère Suisseproducer: Fabrique d'Ebauches Unitas SA
IIDesignations — 0 names

No designation is recorded for this design yet.

IIIExecutions — 1 article

No source in this corpus states which grade any Unitas / ETA 6498 was bought at. That unknown is stored as a real row rather than left blank, so it can be counted, filtered and excluded from any comparison that would otherwise assume parity.

unknownsynthetic
evidence: unknown

no source states which grade this article was bought at — this row exists so 'unknown' stays countable instead of becoming an assumption

exec:unitas-6498/unknown

Specifications

PropertyValueScopeStatusSources
Product family
prod.family_name
Mecaline—accepted
Production status
prod.status
discontinued—accepted

Lineage

The same relationships as the tree at the top of this page, with their sources. An absence in a column means no source stated one.

Ancestors · 1

Where this construction came from. Read up the arrows.

Related · 0

Stored in a different table from descent. A successor is not a child.

None recorded. An absence here means no source stated one, not that none exists.

Used by

1
models
1
brands
1
grade unknown

grain 1 reference — every record here sits at the same level, so the count is one kind of thing.

Every brand here is on the strength of a source that names a watch and states this movement. Brands that use this caliber and nobody has sourced yet are absent — this is what has been researched, not what exists.

Sources

  1. 1
    Watch-Wiki
    https://www.watch-wiki.net/doku.php?id=eta
    wikitier 3retrieved 2026-08-241 fact on this pagecited, never crawled
  2. 2
    Internet Archive
    https://web.archive.org/web/20220818124925/https://shopb2b.eta.ch/mecaline/phased-out/6498-6498-5.html
    archivetier 2retrieved 2022-08-182 facts on this page
  3. 3
    Monochrome Watches
    https://monochrome-watches.com/history-eta-unitas-6497-and-6498-hand-wound-lepine-savonette-movements-technical-guide/
    presstier 2retrieved 2026-08-243 facts on this page
  4. 4
    Internet Archive
    https://web.archive.org/web/20200922052259/https://shopb2b.eta.ch/mecaline/phased-out.html?p=2
    archivetier 2retrieved 2020-09-221 fact on this page
  5. 5
    Internet Archive
    https://web.archive.org/web/20220722191922/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&2&2uswk&Unitas_6498
    archivetier 2retrieved 2022-07-221 fact on this page
  6. 6
    chinesewatchwiki.net
    https://chinesewatchwiki.net/Clone_movements
    wikitier 3retrieved 2026-08-242 facts on this page
  7. 7
    Caliber Corner
    https://calibercorner.com/eta-unitas-caliber-6497-vs-6498/
    curated dbtier 2retrieved 2026-08-241 fact on this pagecited, never crawled
  8. 8
    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
  9. 9
    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
  10. 10
    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