Family line
Seiko 4R36 / NH36
Based-on star (WatchBase sense)3 calibers2 lineage edges0 related edgesdesign:seiko-4r36-nh36compare specs · 3
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) · 3 calibersHeritage · 3 calibersParts cluster (Jules Borel sense) · 1 calibersManufacturer-internal (Ranfft sense) · 1 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 |
|---|---|---|---|---|---|
| Seiko 4R36 / NH36 | derived from lineage | Seiko 6R15 | accepted | — | |
| Seiko 6R15 | derived from lineage | Seiko 7S26 | accepted | — |
Sources
- 1watchuseek.comhttps://www.watchuseek.com/threads/seiko-4r36-vs-7s26-major-improvement-or-just-added-hack-hand-wind.937856/forumtier 4retrieved 2026-08-241 fact on this page
- 2Caliber Cornerhttps://calibercorner.com/seiko-caliber-6r15/curated dbtier 2retrieved 2026-08-241 fact on this pagecited, never crawled