CALIBER/browser
CORPUS EXPORT · 12269 calibers · 59387 family views · round round/2026-09-08Compiled from app/public/data/ · corpus 70c0140eba.
Family treeZenith 3019 PHC (El Primero) — Heritage family: 7 calibers, 6 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 fromderived fromrevision ofrevision ofderived fromRolex 4030 — open caliber pageRolex 40301988Zenith1 exec · grade ?Zenith 3019 PHC (El Primero) — the caliber this page is aboutZenith 3019 PHC (El Primer…1969Zenith1 exec · grade ?Zenith El Primero 3600 — open caliber pageZenith El Primero 36…2019Zenith1 exec · grade ?Zenith El Primero 3620 — open caliber pageZenith El Primero 3620—Zenith1 exec · grade ?Zenith El Primero 400 — open caliber pageZenith El Primero 4…1987Zenith2 exec · grade ?Zenith El Primero 400 Z — open caliber pageZenith El Primero 400…1998Zenith1 exec · grade ?Zenith El Primero 405 — open caliber pageZenith El Primero 4…1997Zenith1 exec · grade ?
accepteddisputed
Sense of “family”Heritage · 7Everything (debug) · 7Parts cluster (Jules Borel sense) · 1Manufacturer-internal (Ranfft sense) · 3Based-on star (WatchBase sense) · 7Open the full family view →

movement

Zenith 3019 PHC (El Primero)

Zenithintroduced 1969design:zenith-3019-phccompare specs · 7
bounding evidence — no range is drawn on the era axis
not after 1987
Zenith El Primero 400 · introduced 1987 (sourced)a revision is not earlier than what it revises · → revision of · rule IR-1 · depth 1 · acceptedthe anchor's own source
not after 1988
Rolex 4030 · introduced 1988 (sourced)a revision is not earlier than what it revises · → revision of · → derived from · rule IR-1 · depth 2 · acceptedthe anchor's own source
not after 1997
Zenith El Primero 405 · introduced 1997 (sourced)a revision is not earlier than what it revises · → revision of · → derived from · rule IR-1 · depth 2 · acceptedthe anchor's own source
not after 1998
Zenith El Primero 400 Z · introduced 1998 (sourced)a revision is not earlier than what it revises · → revision of · → revision of · rule IR-1 · depth 2 · acceptedthe anchor's own source
not after 2019
Zenith El Primero 3600 · introduced 2019 (sourced)a revision is not earlier than what it revises · → revision of · → derived from · rule IR-1 · 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
Zenith 3019 PHC (El Primero)
movementproducer: Zenith
IIDesignations — 0 names

No designation is recorded for this design yet.

IIIExecutions — 1 article

No source in this corpus states which grade any Zenith 3019 PHC (El Primero) 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:zenith-3019-phc/unknown

Specifications

PropertyValueScopeStatusSources
Total components
build.component_count
282—accepted
Chronograph actuation
cmpl.chrono_actuation
column_wheel—accepted
Chronograph construction
cmpl.chrono_construction
integrated—accepted
Chronograph minute counter
cmpl.chrono_minute_counter
subdial_30—accepted
Chronograph
cmpl.has_chronograph
yes—accepted
Date
disp.has_date
yes—accepted
Escapement brand name
esc.brand_name
Clinergic 21—accepted
Escape-wheel teeth
esc.escape_wheel_tooth_count
21—accepted
Escapement family
esc.family
swiss_lever—accepted
Movement height
geom.height_mm
6.5 mm—accepted
Frequency
osc.frequency_vph
36000 vph—accepted
Power reserve (typical)
power.reserve_typical_h
50 h—accepted
Discontinued
prod.discontinued_year
1975—accepted
Introduced
prod.intro_year
1969—accepted
Winding direction
wind.direction
bidirectional—accepted
Winding mode
wind.mode
automatic—accepted
Rotor architecture
wind.rotor_architecture
central—accepted
Rotor bearing
wind.rotor_bearing
ball_bearing—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 · 0

Where this construction came from. Read up the arrows.

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.

Curated family labels

El Primero (Zenith)
authority: zenith7 members

Sources

  1. 1
    Monochrome Watches
    https://monochrome-watches.com/in-depth-the-history-of-the-zenith-el-primero-high-frequency-automatic-chronograph/
    presstier 2retrieved 2026-08-2429 facts on this page
  2. 2
    zenith-watches.com
    https://www.zenith-watches.com/en_us/product/defy-extreme-97-9100-9004-80-i209
    manufacturertier 1retrieved 2026-08-241 fact on this page
  3. 3
    Monochrome Watches
    https://monochrome-watches.com/history-rolex-daytona-chronograph-1963-in-depth-review/
    presstier 2retrieved 2026-08-242 facts on this page
  4. 4
    Monochrome Watches
    https://monochrome-watches.com/zenith-chronomaster-2-the-next-big-step-forward-for-the-el-primero/
    presstier 2retrieved 2026-08-242 facts on this page