Family line
Grand Seiko 9S85
This profile traverses clone_of · derived_from · design_imitation_of · ebauche_of · incorporates_module · 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.
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