unknown
evidence: unknownunder a designationmodified by ZenithEl Primero 400
exec:zenith/el-primero-400
accepteddisputed
movement
Zenith El Primero 400
bounding evidence — no range is drawn on the era axis
not after 1988
Rolex 4030 · introduced 1988 (sourced)
not after 1997
Zenith El Primero 405 · introduced 1997 (sourced)
not after 1998
Zenith El Primero 400 Z · introduced 1998 (sourced)
not after 2019
Zenith El Primero 3600 · introduced 2019 (sourced)
not before 1969
Zenith 3019 PHC (El Primero) · introduced 1969 (sourced)
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 El Primero 400
movementproducer: Zenith
IIDesignations — 1 name
| Issuer | Name | Kind | Disambiguated by | Sources |
|---|---|---|---|---|
| Zenith | El Primero 400 | house | — |
IIIExecutions — 2 articles
No source in this corpus states which grade any Zenith El Primero 400 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-el-primero-400/unknown
Specifications
| Property | Value | Scope | Status | Sources |
|---|---|---|---|---|
Total components build.component_count | 278 | — | accepted | |
Chronograph actuation cmpl.chrono_actuation | column_wheel | — | accepted | |
Chronograph cmpl.has_chronograph | yes | — | accepted | |
Frequency osc.frequency_vph | 36000 vph | — | accepted | |
Power reserve (typical) power.reserve_typical_h | 50 h | — | accepted | |
Introduced prod.intro_year | 1987 | — | accepted | |
Caliber supply type prod.supply_type | in_house | — | accepted | |
Winding mode wind.mode | automatic | — | 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.
- Zenith 3019 PHC (El Primero)revision of
Descendants · 5
What came from it — revisions, variants, clones, licensed copies.
- Rolex 4030derived from
- Zenith El Primero 3600derived from
- Zenith El Primero 400 Zrevision of
- Zenith El Primero 405derived from
- Zenith El Primero 3620derived fromdepth 2
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
Used by
17
models
1
brands
17
grade unknown
grain 17 reference — every record here sits at the same level, so the count is one kind of thing.
- Zenith17 models · supplier not named by the brandmodel:zenith/03-2150-400-26-c714model:zenith/03-2150-400-53-c700model:zenith/03-2150-400-69-c713model:zenith/03-2150-400-69-m2150model:zenith/03-2153-400-78-c813model:zenith/03-2153-400-78-m2150model:zenith/03-a384-400-21-c815model:zenith/03-a384-400-21-m384model:zenith/16-2150-400-21-c706model:zenith/16-2150-400-51-c705model:zenith/18-2150-400-69-c713model:zenith/18-a386-400-69-c807model:zenith/30-a386-400-69-c807model:zenith/45-2150-400-79-c730model:zenith/51-2150-400-69-c713model:zenith/51-2151-400-78-c810model:zenith/65-a386-400-69-c815
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
- 1zenith-watches.comhttps://www.zenith-watches.com/en_us/product/chronomaster-revival-el-primero-a384-03-a384-400-21-m384manufacturertier 1retrieved 2026-08-247 facts on this page
- 2Monochrome Watcheshttps://monochrome-watches.com/in-depth-the-history-of-the-zenith-el-primero-high-frequency-automatic-chronograph/presstier 2retrieved 2026-08-2412 facts on this page
- 3Internet Archivehttps://web.archive.org/web/20180715150630/http://www.zenith-watches.com:80/en_en/chronomaster-el-primero-38-00-1.htmlarchivetier 2retrieved 2026-09-011 fact on this page
- 4zenith-watches.comhttps://www.zenith-watches.com/en_us/product/defy-extreme-97-9100-9004-80-i209manufacturertier 1retrieved 2026-08-241 fact on this page
- 5Monochrome Watcheshttps://monochrome-watches.com/history-rolex-daytona-chronograph-1963-in-depth-review/presstier 2retrieved 2026-08-242 facts on this page
- 6Monochrome Watcheshttps://monochrome-watches.com/zenith-chronomaster-2-the-next-big-step-forward-for-the-el-primero/presstier 2retrieved 2026-08-242 facts on this page