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

Family line

Lemania 1873

Based-on star (WatchBase sense)8 calibers7 lineage edges2 related edgesdesign:lemania-1873compare specs · 8

This profile traverses clone_of · derived_from · ebauche_of · revision_of · variant_of and keeps disputed edges. Every edge in this view carries at least one reference.

Same caliber, other senses of “family”Everything (debug) · 8 calibersHeritage · 8 calibersParts cluster (Jules Borel sense) · 1 calibersManufacturer-internal (Ranfft sense) · 1 calibers
100%drag to pan · ⌘/ctrl + scroll to zoom · hover a caliber to isolate its line
derived fromrevision ofderived fromderived fromderived fromébauche ofébauche ofLemania 1873 — open caliber pageLemania 18731968Lemania Watch C…1 exec · grade ?Lemania 2310 — open caliber pageLemania 23101942Lemania Watch C…1 exec · grade ?Omega 1861 — open caliber pageOmega 1861—Omega1 exec · grade ?Omega 321 (2019 reconstruction) — open caliber pageOmega 321 (2019 reconstructi…2019Omega1 exec · grade ?Omega 3861 — open caliber pageOmega 38612019Omega2 exec · grade ?Omega 861 (Lemania 1873) — open caliber pageOmega 861 (Lemania 187…1968maker not sourced1 exec · grade ?Omega 862 (Lemania 1873) — open caliber pageOmega 862 (Lemania 187…1968maker not sourced1 exec · grade ?Patek Philippe CH 27-70 Q — open caliber pagePatek Philippe CH 27-70 Q1986Patek Philip…composite · 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
Lemania 1873derived from
lineage
Lemania 2310acceptedinterchange note: four sourced changes from the 321: chronograph actuation simplified from a column wheel to a shuttle/cam system, screwed balance replaced by a smooth balance, frequency raised 18,000 → 21,600 vph, flat balance spring adopted, bridge shape altered · component delta: escapement_architecture,balance_wheel,balance_spring,bridges,frequency
Omega 1861revision of
lineage
Lemania 1873acceptedinterchange note: the source frames the 1861 as the "more modern version" of the 861, i.e. the same construction carried forward rather than a new one; the specific component deltas are NOT sourced here and are deliberately not asserted
Omega 321 (2019 reconstruction)derived from
lineage
Lemania 2310acceptedinterchange note: reconstruction, not a revision: the 2019 movement follows the technical specifications of the SECOND generation of the original, reconstructed from Omega Museum research, original plans and a tomographic scan of the Speedmaster ST 105.003 worn on Apollo 17. The only stated evolution is finishing and engraving.
Omega 3861derived from
lineage
Omega 1861acceptedinterchange note: co-axial escapement, Si14 silicon balance spring and a free-sprung balance grafted onto the 1861 architecture; the source names both the Omega 1861 and its Lemania 1873 ancestor as the architecture carried forward · component delta: escapement_architecture,balance_spring,balance_wheel,regulation_method
Patek Philippe CH 27-70 Qderived from
lineage
Lemania 2310acceptedinterchange note: Heavily reworked to Patek's specification; the source does not enumerate the component deltas.
Omega 861 (Lemania 1873)ébauche of
lineage
Lemania 1873staged—
Omega 862 (Lemania 1873)ébauche of
lineage
Lemania 1873staged—
design:patek-philippe-ch-29-535-pssuccessor of
related
Patek Philippe CH 27-70 QacceptedReplaced the Lemania-based chronograph in Patek's own line. Succession, not descent — which is why this edge lives in the related lane.
design:patek-philippe-ch-29-535-psno derivation between
related
Lemania 2310acceptedThe sources describe a clean-sheet in-house caliber, not a reworking of the Lemania ébauche that preceded it in the same collection.

Sources

  1. 1
    Monochrome Watches
    https://monochrome-watches.com/in-depth-the-omega-flightmaster-the-special-one/
    presstier 2retrieved 2026-08-241 fact on this page
  2. 2
    Monochrome Watches
    https://monochrome-watches.com/omega-reintroduces-the-iconic-calibre-321-chronograph-column-wheel-2019/
    presstier 2retrieved 2026-08-242 facts on this page
  3. 3
    Monochrome Watches
    https://monochrome-watches.com/omega-co-axial-escapement-technical-perspective/
    presstier 2retrieved 2026-08-241 fact on this page
  4. 4
    Monochrome Watches
    https://monochrome-watches.com/history-of-the-patek-philippe-perpetual-calendar-chronograph-1518-2499-3970-5020-5970-5270-in-depth-guide/
    presstier 2retrieved 2026-08-243 facts on this page
  5. 5
    Internet Archive
    https://web.archive.org/web/20230901194459/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Omega_861
    archivetier 2retrieved 2023-09-011 fact on this page
  6. 6
    Internet Archive
    https://web.archive.org/web/20230901194604/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Omega_862
    archivetier 2retrieved 2023-09-011 fact on this page
  7. 7
    Monochrome Watches
    https://monochrome-watches.com/the-battle-of-high-end-chronographs-part-1-patek-philippe-5172g/
    presstier 2retrieved 2026-08-242 facts on this page