CALIBER/browser
CORPUS EXPORT · 12269 calibers · 59387 family views · round round/2026-09-08Compiled from app/public/data/ · corpus 70c0140eba.
Family treeValjoux / ETA 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 — the caliber this page is aboutValjoux / 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) — open caliber pageValjoux 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) · 5Based-on star (WatchBase sense) · 26Open the full family view →

movement

Valjoux / ETA 7750

ETA SA Manufacture Horlogère Suisse · 1985–presentETA SA Manufacture Horlogère SuisseValjoux SA · 1973–1985introduced 1974design:valjoux-7750compare specs · 8
bounding evidence — no range is drawn on the era axis
not after 1986
Valjoux / ETA 7751 · introduced 1986 (sourced)a variant is defined relative to a base that exists first · → variant of · rule IR-5 · depth 1 · acceptedthe anchor's own source
not after 1986
Valjoux 7758 (Valjoux 7750) · introduced 1986 (sourced)a variant is defined relative to a base that exists first · → variant of · rule IR-5 · depth 1 · stagedthe anchor's own source
not after 1995
Valjoux / ETA 7751 · bounded to 1995 (a sourced bound)a variant is defined relative to a base that exists first · → variant of · rule IR-5 · depth 1 · stagedthe anchor's own source
not after 1995
a dated example movement, ca. 1990 (+5 yr, the source says “circa”)“1-3) ca. 1990: V8 V8DDA, VAL 7750, 17 Jewels; Incabloc”
not after 2002
Valjoux / ETA 7754 · bounded to 2002 (a sourced bound)a variant is defined relative to a base that exists first · → variant of · rule IR-5 · depth 1 · stagedthe anchor's own source
not after 2002
Valjoux / ETA 7753 · bounded to 2002 (a sourced bound)a variant is defined relative to a base that exists first · → variant of · rule IR-5 · depth 1 · stagedthe anchor's own source
not after 2002
Valjoux 7758 (Valjoux 7750) · bounded to 2002 (a sourced bound)a variant is defined relative to a base that exists first · → variant of · rule IR-5 · depth 1 · stagedthe anchor's own source
not after 2002
Valjoux 7770 (Valjoux 7750) · bounded to 2002 (a sourced bound)a variant is defined relative to a base that exists first · → variant of · rule IR-5 · depth 1 · stagedthe anchor's own source
not after 2002
a dated example movement, 2002“5) 2002: Zeno-Watch Basel, Swiss, 25 Jewels; Incabloc”
not after 2003
Valjoux / ETA 7754 · introduced 2003 (sourced)a variant is defined relative to a base that exists first · → variant of · rule IR-5 · depth 1 · acceptedthe anchor's own source
not after 2004
Valjoux 7770 (Valjoux 7750) · introduced 2004 (sourced)a variant is defined relative to a base that exists first · → variant of · rule IR-5 · depth 1 · stagedthe anchor's own source
not after 2009
Sellita SW500 · introduced 2009 (sourced)you cannot clone what does not exist · → clone of · rule IR-3 · depth 1 · acceptedthe anchor's own source
not before 1948
Venus 188 / Valjoux 7730 · introduced 1948 (sourced)a variant is defined relative to a base that exists first · ← variant of · ← derived from · rule IR-5 · depth 2 · acceptedthe anchor's own source
not before 1969
Valjoux 7733 · introduced 1969 (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
Valjoux / ETA 7750
movementproducer: ETA SA Manufacture Horlogère Suisseproducer: ETA SA Manufacture Horlogère Suisseproducer: Valjoux SA
IIDesignations — 4 names
IssuerNameKindDisambiguated bySources
ETA SA Manufacture Horlogère Suisse7750catalog—
IWC Schaffhausen79320house—
IWC Schaffhausen79350house—
Valjoux SA7750catalog—
IIIExecutions — 3 articles

No source in this corpus states which grade any Valjoux / ETA 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.

unknown
evidence: unknownunder a designationmodified by IWC Schaffhausen79320
exec:iwc/79320
unknown
evidence: unknownunder a designationmodified by IWC Schaffhausen79350
exec:iwc/79350
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-7750/unknown

Specifications

PropertyValueScopeStatusSources
Jewels
build.jewel_count
25—accepted
Chronograph actuation
cmpl.chrono_actuation
cam—accepted
Chronograph clutch
cmpl.chrono_clutch
oscillating_pinion—accepted
Chronograph construction
cmpl.chrono_construction
integrated—accepted
Counter layout
cmpl.chrono_counter_layout
12_9_6—accepted
Movement diameter
geom.diameter_mm
30 mm—accepted
Movement height
geom.height_mm
7.9 mm—accepted
Frequency
osc.frequency_vph
28800 vph—accepted
Power reserve (typical)
power.reserve_typical_h
48 h—disputed
Power reserve (typical)
power.reserve_typical_h
54 h—disputed
Product family
prod.family_name
Mecaline Chronographes—accepted
Introduced
prod.intro_year
1974—disputed
Introduced
prod.intro_year
1973—disputed

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 · 20

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

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

221
models
3
brands
225
grade unknown

grain 1 model · 220 reference — the count above mixes levels. A family record is one the source states a movement for family-wide; a reference record is one case reference. They are not the same unit and are never summed silently.

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
    Monochrome Watches
    https://monochrome-watches.com/valjoux-7750-chronograph-history-50-years-technical-explanation-evolution-clones-in-depth-review/
    presstier 2retrieved 2026-08-2414 facts on this page
  2. 2
    Internet Archive
    https://web.archive.org/web/20190822220843/https://www.eta.ch/en/our-products/mechanical-movements/mecaline-chronographs/eta-mecaline-chronographs-7750-valjoux
    archivetier 2retrieved 2019-08-227 facts on this page
  3. 3
    Caliber Corner
    https://calibercorner.com/eta-valjoux-caliber-7750/
    curated dbtier 2retrieved 2026-08-248 facts on this pagecited, never crawled
  4. 4
    Worn & Wound
    https://wornandwound.com/chronography-13-the-important-history-of-the-valjoux-7730-a-classic-mid-century-movement/
    presstier 2retrieved 2026-08-253 facts on this page
  5. 5
    ETA SA
    https://www.eta.ch/en/eta-mecaline-chronographs-7750-valjoux
    manufacturertier 1retrieved 2026-08-241 fact on this page
  6. 6
    professionalwatches.com
    https://professionalwatches.com/iwc-pilots-watch-chronograph/
    presstier 2retrieved 2026-09-011 fact on this page
  7. 7
    Caliber Corner
    https://calibercorner.com/iwc-caliber-79350/
    curated dbtier 2retrieved 2026-09-011 fact on this pagecited, never crawled
  8. 8
    Internet Archive
    https://web.archive.org/web/20230902010954/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Valjoux_7758
    archivetier 2retrieved 2023-09-023 facts on this page
  9. 9
    Internet Archive
    https://web.archive.org/web/20181108095454/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Valjoux_7751
    archivetier 2retrieved 2018-11-081 fact on this page
  10. 10
    Internet Archive
    https://web.archive.org/web/20230907184050/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&172&2uswk&Valjoux_7750
    archivetier 2retrieved 2023-09-072 facts on this page
  11. 11
    Internet Archive
    https://web.archive.org/web/20230902010903/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Valjoux_7754
    archivetier 2retrieved 2023-09-021 fact on this page
  12. 12
    Internet Archive
    https://web.archive.org/web/20181108095505/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Valjoux_7753
    archivetier 2retrieved 2018-11-081 fact on this page
  13. 13
    Internet Archive
    https://web.archive.org/web/20230902011016/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Valjoux_7770
    archivetier 2retrieved 2023-09-023 facts on this page
  14. 14
    Caliber Corner
    https://calibercorner.com/hamilton-caliber-h31/
    curated dbtier 2retrieved 2026-08-241 fact on this pagecited, never crawled
  15. 15
    WatchBase
    https://watchbase.com/hamilton/caliber/h-31
    archivetier 3retrieved 2026-08-241 fact on this pagecited, never crawled
  16. 16
    Caliber Corner
    https://calibercorner.com/sellita-caliber-sw500/
    curated dbtier 2retrieved 2026-08-241 fact on this pagecited, never crawled
  17. 17
    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
  18. 18
    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
  19. 19
    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
  20. 20
    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
  21. 21
    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
  22. 22
    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
  23. 23
    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
  24. 24
    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
  25. 25
    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
  26. 26
    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
  27. 27
    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
  28. 28
    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
  29. 29
    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
  30. 30
    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
  31. 31
    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