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:rolex-4030/unknown
accepteddisputed
movement
Rolex 4030
bounding evidence — no range is drawn on the era axis
not after 2000
Rolex 4130 · introduced 2000 (sourced)
not before 1969
Zenith 3019 PHC (El Primero) · introduced 1969 (sourced)
not before 1987
Zenith El Primero 400 · introduced 1987 (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
Rolex 4030
movementproducer: Rolex SAproducer: Zenith
IIDesignations — 0 names
No designation is recorded for this design yet.
IIIExecutions — 1 article
No source in this corpus states which grade any Rolex 4030 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.
Specifications
| Property | Value | Scope | Status | Sources |
|---|---|---|---|---|
Jewels build.jewel_count | 31 | — | accepted | |
Chronograph actuation cmpl.chrono_actuation | column_wheel | — | accepted | |
Chronograph clutch cmpl.chrono_clutch | horizontal_lateral | — | accepted | |
Chronograph construction cmpl.chrono_construction | integrated | — | accepted | |
Chronograph cmpl.has_chronograph | yes | — | accepted | |
Date disp.has_date | no | — | accepted | |
Balance material osc.balance_material | glucydur | — | accepted | |
Frequency osc.frequency_vph | 28800 vph | — | accepted | |
Hairspring geometry osc.hairspring_geometry | breguet_gradual | — | accepted | |
Regulation type osc.regulation_type | free_sprung_screws | — | accepted | |
Regulator system name osc.regulator_system_name | Microstella | — | accepted | |
Power reserve (typical) power.reserve_typical_h | 54 h | — | accepted | |
Discontinued prod.discontinued_year | 2000 | — | accepted | |
Introduced prod.intro_year | 1988 | — | accepted | |
Caliber supply type prod.supply_type | supplied_modified | — | 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 · 2
Where this construction came from. Read up the arrows.
- Zenith El Primero 400derived from
- Zenith 3019 PHC (El Primero)derived fromrevision ofdepth 2
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 · 1
Stored in a different table from descent. A successor is not a child.
- Rolex 4130successor of
Commercial replacement, NOT descent. Sources describe the 4130 as Rolex's FIRST in-house chronograph and compare it to the 4030 only by contrast — fewer parts, vertical instead of horizontal clutch, longer reserve, sub-dial order changed. No source consulted asserts that the 4130 derives from the 4030 or from the Zenith El Primero, and no lineage edge is authored here.
Sources
- 1Monochrome Watcheshttps://monochrome-watches.com/history-rolex-daytona-chronograph-1963-in-depth-review/presstier 2retrieved 2026-08-2417 facts on this page
- 2Monochrome Watcheshttps://monochrome-watches.com/in-depth-the-history-of-the-zenith-el-primero-high-frequency-automatic-chronograph/presstier 2retrieved 2026-08-2416 facts on this page
- 3Monochrome Watcheshttps://monochrome-watches.com/zenith-chronomaster-2-the-next-big-step-forward-for-the-el-primero/presstier 2retrieved 2026-08-241 fact on this page