El Primero (Zenith)
authority: zenith7 members
Family line
Zenith 3019 PHC (El Primero)
Manufacturer-internal (Ranfft sense)3 calibers2 lineage edges0 related edgesdesign:zenith-3019-phccompare specs · 3
This profile traverses revision_of · variant_of and drops disputed edges. Every edge in this view carries at least one reference.
Same caliber, other senses of “family”Everything (debug) · 7 calibersHeritage · 7 calibersParts cluster (Jules Borel sense) · 1 calibersBased-on star (WatchBase sense) · 7 calibers
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
| Caliber | Relationship | To | Status | Detail | Sources |
|---|---|---|---|---|---|
| Zenith El Primero 400 | revision of lineage | Zenith 3019 PHC (El Primero) | accepted | interchange note: the sourced delta is an upgraded shock protection system introduced by 1987, at which point the movement was renumbered 400, "moving beyond the classification inherited from the Martel Watch". The 3019 PHF calendar/moonphase sibling was renumbered 410 in the same move. · component delta: shock_absorber | |
| Zenith El Primero 400 Z | revision of lineage | Zenith El Primero 400 | accepted | interchange note: chronograph bridge redesigned; fourth (seconds) wheel 100 teeth / 5 arms → 120 teeth / 6 arms; escape wheel 21 → 20 teeth; a blade added to the pinion; lever fork horns modified. The same changes were applied to the 405 Z and 420 Z. · component delta: bridges,gear_train,escapement_architecture,pallet_fork |
Curated overlays
A curated family label is an attributed opinion about grouping, not a node in the graph. No edge can point at one, and membership never affects ancestry.
Sources
- 1Monochrome Watcheshttps://monochrome-watches.com/in-depth-the-history-of-the-zenith-el-primero-high-frequency-automatic-chronograph/presstier 2retrieved 2026-08-243 facts on this page
- 2zenith-watches.comhttps://www.zenith-watches.com/en_us/product/defy-extreme-97-9100-9004-80-i209manufacturertier 1retrieved 2026-08-241 fact on this page