CALIBER/browser
CORPUS EXPORT · 12269 calibers · 59387 family views · round round/2026-09-08Compiled from app/public/data/ · corpus 70c0140eba.
Family treeValjoux 7758 (Valjoux 7750) — Heritage family: 26 calibers, 25 sourced lineage links.Drag to explore.
100%overlaydrag to pan · hover a caliber to isolate its line · scroll the page normallyopen the full family view →
derived fromderived fromclone ofderived fromvariant ofvariant ofvariant ofvariant ofébauche ofébauche ofébauche ofébauche ofébauche ofébauche ofébauche ofébauche ofébauche ofébauche ofébauche ofébauche ofébauche ofébauche ofébauche ofvariant ofvariant ofAlfred Rochat 7750 (Valjoux 7750) — open caliber pageAlfred Rochat 7750 (Valjoux 775…—maker not sourced1 exec · grade ?BM 13750 (Valjoux 7750) — open caliber pageBM 13750 (Valjoux 775…1973maker not sourced1 exec · grade ?Dugena 4002 (Valjoux 7733) — open caliber pageDugena 4002 (Valjoux 773…1969maker not sourced1 exec · grade ?Fortis 2001 (Valjoux 7750) — open caliber pageFortis 2001 (Valjoux 7750)—maker not sourced1 exec · grade ?Hamilton H-31 — open caliber pageHamilton H-31—ETA SA Manufacture Horlogère…1 exec · grade ?IWC 790 (Valjoux 7750) — open caliber pageIWC 790 (Valjoux 775…1973maker not sourced1 exec · grade ?Junghans 688.11 (Valjoux 7733) — open caliber pageJunghans 688.11 (Valjoux 7733)—maker not sourced1 exec · grade ?La Joux-Perret L100 — open caliber pageLa Joux-Perret L100—Manufacture La Joux-Perret …1 exec · grade ?Omega 1150 (Valjoux 7751) — open caliber pageOmega 1150 (Valjoux 775…1990maker not sourced1 exec · grade ?Omega 1151 (Valjoux 7751) — open caliber pageOmega 1151 (Valjoux 775…1994maker not sourced1 exec · grade ?Omega 1152 (Valjoux 7750) — open caliber pageOmega 1152 (Valjoux 775…1995maker not sourced1 exec · grade ?Omega 1154 (Valjoux 7750) — open caliber pageOmega 1154 (Valjoux 775…1992maker not sourced1 exec · grade ?Omega 1155 (Valjoux 7750) — open caliber pageOmega 1155 (Valjoux 775…1990maker not sourced1 exec · grade ?Omega 1156 (Valjoux 7750) — open caliber pageOmega 1156 (Valjoux 775…1990maker not sourced1 exec · grade ?Omega 1158 (Valjoux 7750) — open caliber pageOmega 1158 (Valjoux 775…1991maker not sourced1 exec · grade ?Omega 1164 (Valjoux 7750) — open caliber pageOmega 1164 (Valjoux 775…1995maker not sourced1 exec · grade ?Sellita SW500 — open caliber pageSellita SW5002009Sellita Watch Co S.A.4 execTissot 2060 (Valjoux 7733) — open caliber pageTissot 2060 (Valjoux 773…1970maker not sourced1 exec · grade ?Valjoux 7733 — open caliber pageValjoux 77331969Valjoux SA1 exec · grade ?Valjoux / ETA 7750 — open caliber pageValjoux / ETA 77501974ETA SA Manufacture Horlogère…3 exec · grade ?Valjoux / ETA 7751 — open caliber pageValjoux / ETA 77511986ETA SA Manufacture Horlogère…1 exec · grade ?Valjoux / ETA 7753 — open caliber pageValjoux / ETA 7753—ETA SA Manufacture Horlogère…3 exec · grade ?Valjoux / ETA 7754 — open caliber pageValjoux / ETA 77542003ETA SA Manufacture Horlogère…1 exec · grade ?Valjoux 7758 (Valjoux 7750) — the caliber this page is aboutValjoux 7758 (Valjoux 775…1986maker not sourced1 exec · grade ?Valjoux 7770 (Valjoux 7750) — open caliber pageValjoux 7770 (Valjoux 7750)2004ETA SA Manufacture Horlogère…1 exec · grade ?Venus 188 / Valjoux 7730 — open caliber pageVenus 188 / Valjoux 77…1948Valjoux SA1 exec · grade ?
accepteddisputed
Sense of “family”Heritage · 26Everything (debug) · 26Parts cluster (Jules Borel sense) · 1Manufacturer-internal (Ranfft sense) · 1Based-on star (WatchBase sense) · 26Open the full family view →

movement

Valjoux 7758 (Valjoux 7750)

maker not sourcedintroduced 1986design:valjoux-7758compare specs · 4
bounding evidence — no range is drawn on the era axis
not after 2002
a dated example movement, 2002“2002: Zeno-Watch Basel, Swiss, 25 jJewels; Incabloc”
not before 1969
Valjoux 7733 · introduced 1969 (sourced)a variant is defined relative to a base that exists first · ← variant of · ← variant of · rule IR-5 · depth 2 · 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
Valjoux 7758 (Valjoux 7750)
movement
IIDesignations — 0 names

No designation is recorded for this design yet.

IIIExecutions — 1 article

No source in this corpus states which grade any Valjoux 7758 (Valjoux 7750) 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:valjoux-7758/unknown

Specifications

PropertyValueScopeStatusSources
Jewels
build.jewel_count
17Ranfft data sheet, the 17-jewel member of its 17/25 rangestaged
Jewels
build.jewel_count
25Ranfft data sheet, the 25-jewel member of its 17/25 rangestaged
Moonphase
cmpl.has_moonphase
yes—staged
Date correction
disp.date_quickset
crown—staged
Date
disp.has_date
yes—staged
Seconds display
disp.seconds_display
small—staged
Casing diameter
geom.casing_diameter_mm
30.4 mm—staged
Movement diameter
geom.diameter_mm
30 mm—staged
Movement height
geom.height_mm
7.9 mm—staged
Frequency
osc.frequency_vph
28800 vph—staged
Shock protection
osc.shock_protection
incablocexample movement, 2002staged
Power reserve (typical)
power.reserve_typical_h
46 h—staged
Discontinued
prod.discontinued_year
2005—staged
Introduced
prod.intro_year
1986—staged
Hacking seconds
wind.has_hacking_seconds
yes—staged
Winding mode
wind.mode
automatic—staged

Where a property carries more than one value, the values have different scopes — an official spec sheet and observed hardware, say. Different scopes are not a disagreement, so both are accepted and both are shown with the scope they apply to.

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.

Descendants · 0

What came from it — revisions, variants, clones, licensed copies.

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

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
    Internet Archive
    https://web.archive.org/web/20230902010954/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Valjoux_7758
    archivetier 2retrieved 2023-09-0218 facts on this page
  2. 2
    Worn & Wound
    https://wornandwound.com/chronography-13-the-important-history-of-the-valjoux-7730-a-classic-mid-century-movement/
    presstier 2retrieved 2026-08-251 fact on this page
  3. 3
    Caliber Corner
    https://calibercorner.com/hamilton-caliber-h31/
    curated dbtier 2retrieved 2026-08-241 fact on this pagecited, never crawled
  4. 4
    WatchBase
    https://watchbase.com/hamilton/caliber/h-31
    archivetier 3retrieved 2026-08-241 fact on this pagecited, never crawled
  5. 5
    Monochrome Watches
    https://monochrome-watches.com/valjoux-7750-chronograph-history-50-years-technical-explanation-evolution-clones-in-depth-review/
    presstier 2retrieved 2026-08-247 facts on this page
  6. 6
    Caliber Corner
    https://calibercorner.com/sellita-caliber-sw500/
    curated dbtier 2retrieved 2026-08-241 fact on this pagecited, never crawled
  7. 7
    Caliber Corner
    https://calibercorner.com/eta-valjoux-caliber-7750/
    curated dbtier 2retrieved 2026-08-241 fact on this pagecited, never crawled
  8. 8
    Internet Archive
    https://web.archive.org/web/20181106092340/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Alfred_Rochat_7750
    archivetier 2retrieved 2018-11-061 fact on this page
  9. 9
    Internet Archive
    https://web.archive.org/web/20230905221303/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&BM_13750&
    archivetier 2retrieved 2023-09-051 fact on this page
  10. 10
    Internet Archive
    https://web.archive.org/web/20181106135001/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Dugena_4002
    archivetier 2retrieved 2018-11-061 fact on this page
  11. 11
    Internet Archive
    https://web.archive.org/web/20181107150926/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Fortis_2001
    archivetier 2retrieved 2018-11-071 fact on this page
  12. 12
    Internet Archive
    https://web.archive.org/web/20181107172737/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&IWC_790
    archivetier 2retrieved 2018-11-071 fact on this page
  13. 13
    Internet Archive
    https://web.archive.org/web/20171030230312/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&129&2uswk&Junghans_688_11
    archivetier 2retrieved 2017-10-301 fact on this page
  14. 14
    Internet Archive
    https://web.archive.org/web/20230901185932/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Omega_1150
    archivetier 2retrieved 2023-09-011 fact on this page
  15. 15
    Internet Archive
    https://web.archive.org/web/20230901185941/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Omega_1151
    archivetier 2retrieved 2023-09-011 fact on this page
  16. 16
    Internet Archive
    https://web.archive.org/web/20230901185951/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Omega_1152
    archivetier 2retrieved 2023-09-011 fact on this page
  17. 17
    Internet Archive
    https://web.archive.org/web/20230901190007/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Omega_1154
    archivetier 2retrieved 2023-09-011 fact on this page
  18. 18
    Internet Archive
    https://web.archive.org/web/20230901190119/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Omega_1155
    archivetier 2retrieved 2023-09-011 fact on this page
  19. 19
    Internet Archive
    https://web.archive.org/web/20230901190233/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Omega_1156
    archivetier 2retrieved 2023-09-011 fact on this page
  20. 20
    Internet Archive
    https://web.archive.org/web/20230901190247/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Omega_1158
    archivetier 2retrieved 2023-09-011 fact on this page
  21. 21
    Internet Archive
    https://web.archive.org/web/20171031005826/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&155&2uswk&Omega_1164
    archivetier 2retrieved 2017-10-311 fact on this page
  22. 22
    Internet Archive
    https://web.archive.org/web/20181108071335/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Tissot_2060
    archivetier 2retrieved 2018-11-081 fact on this page
  23. 23
    Internet Archive
    https://web.archive.org/web/20230902011016/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Valjoux_7770
    archivetier 2retrieved 2023-09-021 fact on this page