Family line
Grand Seiko 9S85
This profile traverses clone_of · derived_from · ebauche_of · licensed_copy_of · module_on · revision_of · tooling_transfer_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 calibersParts cluster (Jules Borel sense) · 1 calibersManufacturer-internal (Ranfft sense) · 1 calibersBased-on star (WatchBase sense) · 3 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 |
|---|---|---|---|---|---|
| Grand Seiko 9S86 | derived from lineage | Grand Seiko 9S85 | accepted | interchange note: Grand Seiko calls the 9S85 the base caliber and describes the GMT hand and the independently-settable hour hand as the addition. Jewel count is unchanged at 37. · component delta: complication_module | |
| Seiko 8L55 | derived from lineage | Grand Seiko 9S85 | accepted | interchange note: The source names decoration as the difference and gives figures identical to the 9S85’s: 36,000 vph, 55 h, 37 jewels. · component delta: decoration |
Sources
- 1grand-seiko.comhttps://www.grand-seiko.com/us-en/collections/movement/mechanical/9s86manufacturertier 1retrieved 2026-08-241 fact on this page
- 2Monochrome Watcheshttps://monochrome-watches.com/seiko-prospex-diver-300m-hi-beat-sla025-baselworld-2018-specs-price/presstier 2retrieved 2026-08-241 fact on this page