CALIBER/browser
CORPUS EXPORT · 12269 calibers · 59387 family views · round round/2026-09-08Compiled from app/public/data/ · corpus 70c0140eba.

Manufacturer

Seiko Watch Corporation

91 designsJPproduceragent:seiko

Attribution is time-dependent in this model: a design keeps its identity when a company is absorbed, and only the maker record moves. Every row of the designs table below carries the source for its own attribution.

Family lines

5 of 91 connected4 Heritage lines8 under other senses

91 designs are attributed to Seiko Watch Corporation. 5 of them sit in 4 recorded family lines under the Heritage sense of the word — the 3 largest are drawn below, the rest listed under them. The other 86 stand alone in this sense, and no other sense of “family” puts them in one either: this corpus records no relative for them — not that none exists.

accepteddisputed
Line 1Grand Seiko 9S55 — Heritage family: 5 calibers, 4 sourced lineage links. 2 of them are attributed to Seiko Watch Corporation.Drag to explore.
100%drag to pan · hover a caliber to isolate its line · scroll the page normallyopen the full family view →
successor ofderived fromderived fromderived fromderived fromGrand Seiko 9S55 — open caliber pageGrand Seiko 9S551998Grand Seiko2 exec · grade ?Grand Seiko 9S65 — open caliber pageGrand Seiko 9S652010Grand Seiko2 exec · grade ?Grand Seiko 9S66 — open caliber pageGrand Seiko 9S66—Grand Seiko2 exec · grade ?Seiko 8L35 — open caliber pageSeiko 8L35—Seiko Watch Corporation1 exec · grade ?Seiko 8L45 — open caliber pageSeiko 8L452025Seiko Watch Corporation1 exec · grade ?
Line 2Grand Seiko 9R65 — Heritage family: 3 calibers, 2 sourced lineage links. 1 of them is attributed to Seiko Watch Corporation.Drag to explore.
100%drag to pan · hover a caliber to isolate its line · scroll the page normallyopen the full family view →
derived fromderived fromGrand Seiko 9R65 — open caliber pageGrand Seiko 9R…2004Grand Seiko3 execGrand Seiko 9R66 — open caliber pageGrand Seiko 9R…2006Grand Seiko3 execSeiko 7R68 — open caliber pageSeiko 7R681999Seiko Watch Corporation1 exec · grade ?
Line 3Grand Seiko 9S85 — Heritage family: 3 calibers, 2 sourced lineage links. 1 of them is attributed to Seiko Watch Corporation.Drag to explore.
100%drag to pan · hover a caliber to isolate its line · scroll the page normallyopen the full family view →
derived fromderived fromGrand Seiko 9S85 — open caliber pageGrand Seiko 9S852009Grand Seiko3 exec · grade ?Grand Seiko 9S86 — open caliber pageGrand Seiko 9S862014Grand Seiko2 exec · grade ?Seiko 8L55 — open caliber pageSeiko 8L55—Seiko Watch Corporation1 exec · grade ?

1 more line in this sense

Other senses of “family”8 lines

A cluster profile is a rule for what counts as descent, not an opinion about it. These are the lines this maker’s designs sit in under the site’s other rules — a broader one keeps edge types that the Heritage sense does not traverse, so the same root can appear here with more members. Nothing below is a relationship the corpus does not hold; it is the same claims read under a different filter, and each view says on its own page which edge types it traversed.

LineSenseCalibersThis maker’s
Grand Seiko 9S55Everything (debug)52
Grand Seiko 9S55Based-on star (WatchBase sense)52
Grand Seiko 9R65Everything (debug)31
Grand Seiko 9S85Everything (debug)31
Grand Seiko 9R65Based-on star (WatchBase sense)31
Grand Seiko 9S85Based-on star (WatchBase sense)31
Credor CR01Everything (debug)21
Credor CR01Based-on star (WatchBase sense)21

Corporate history

These edges move ownership and names, never designs. This is why “who made the 7750 in 1978” and “who makes it now” are different questions with different answers about the same construction.

FromRelationToPeriodStatusClaim
Grand Seikosubsidiary ofSeiko Watch Corporation—acceptedce8f47aab8c37b1c3
Seiko Epson Corporationsupplies toSeiko Watch Corporation—acceptedc6ed9ab488dcfe0f9
Seiko Watch Corporationsubsidiary ofseiko-group—acceptedc959ab0b1e6464a0b

The export gives these edges a claim id but no inline reference, so the claim id is shown as the citation anchor rather than a source link.

Product lines

Lines come from the brand corpus and carry its sources; memberships are separate claims with their own. A line with no models is a line we have sourced but hold no model for — not an error, and not to be hidden.

LineWatchesFiled bySources
5 Sports63page filing 63
Astron21page filing 21
King Seiko12page filing 12
Presage74page filing 74
Prospex85page filing 85

Designs attributed to Seiko Watch Corporation

DesignationRoleAttributedIntroducedFamilySources
Seiko 4M21Aproducerarchive filingno dates given—stands alone
Seiko 5M42Aproducerarchive filingno dates given—stands alone
Seiko 5M43Aproducerarchive filingno dates given—stands alone
Seiko 6L35producerno dates given—2 calibers
Seiko 7R68producerno dates given19993 calibers
Seiko 7S26Aproducerarchive filingno dates given1995stands alone
Seiko 7S26Bproducerarchive filingno dates given—stands alone
Seiko 7S36Aproducerarchive filingno dates given—stands alone
Seiko 7S36Bproducerarchive filingno dates given—stands alone
Seiko 8L35producerno dates given—5 calibers
Seiko 8L45producerno dates given20255 calibers
Seiko 8L55producerno dates given—3 calibers
Seiko 11Aproducerarchive filingno dates given—stands alone
Seiko 63Aproducerarchive filingno dates given1976stands alone
Seiko 66Aproducerarchive filingno dates given—stands alone
Seiko 66Bproducerarchive filingno dates given—stands alone
Seiko 436producerarchive filingno dates given—stands alone
Seiko 1100Aproducerarchive filingno dates given—stands alone
Seiko 2202Aproducerarchive filingno dates given—stands alone
Seiko 2205Aproducerarchive filingno dates given—stands alone
Seiko 2206Aproducerarchive filingno dates given—stands alone
Seiko 2220Aproducerarchive filingno dates given—stands alone
Seiko 2501Aproducerarchive filingno dates given—stands alone
Seiko 2501Bproducerarchive filingno dates given—stands alone
Seiko 2505Aproducerarchive filingno dates given—stands alone
Seiko 2505Bproducerarchive filingno dates given—stands alone
Seiko 2517Aproducerarchive filingno dates given—stands alone
Seiko 2517Bproducerarchive filingno dates given—stands alone
Seiko 3702Bproducerarchive filingno dates given—stands alone
Seiko 3703Bproducerarchive filingno dates given—stands alone
Seiko 4005Aproducerarchive filingno dates given1967stands alone
Seiko 4006Aproducerarchive filingno dates given1967stands alone
Seiko 4205Aproducerarchive filingno dates given—stands alone
Seiko 4205Bproducerarchive filingno dates given—stands alone
Seiko 4206Aproducerarchive filingno dates given—stands alone
Seiko 4206Bproducerarchive filingno dates given—stands alone
Seiko 4207Bproducerarchive filingno dates given—stands alone
Seiko 4361producerarchive filingno dates given—stands alone
Seiko 5601Aproducerarchive filingno dates given1968stands alone
Seiko 5605Aproducerarchive filingno dates given1968stands alone
Seiko 5606Aproducerarchive filingno dates given1968stands alone
Seiko 5619Aproducerarchive filingno dates given1968stands alone
Seiko 5621Aproducerarchive filingno dates given1969stands alone
Seiko 5621Bproducerarchive filingno dates given1969stands alone
Seiko 5625Aproducerarchive filingno dates given1968stands alone
Seiko 5625Bproducerarchive filingno dates given1969stands alone
Seiko 5626Aproducerarchive filingno dates given1968stands alone
Seiko 5626Bproducerarchive filingno dates given1969stands alone
Seiko 5641Aproducerarchive filingno dates given1970stands alone
Seiko 5645Aproducerarchive filingno dates given1970stands alone
Seiko 5646Aproducerarchive filingno dates given1970stands alone
Seiko 6105Aproducerarchive filingno dates given1968stands alone
Seiko 6105Bproducerarchive filingno dates given1968stands alone
Seiko 6106Aproducerarchive filingno dates given1967stands alone
Seiko 6106Bproducerarchive filingno dates given1968stands alone
Seiko 6106Cproducerarchive filingno dates given1969stands alone
Seiko 6117Aproducerarchive filingno dates given1968stands alone
Seiko 6117Bproducerarchive filingno dates given1968stands alone
Seiko 6118Aproducerarchive filingno dates given1968stands alone
Seiko 6119Aproducerarchive filingno dates given1967stands alone
Seiko 6119Bproducerarchive filingno dates given1968stands alone
Seiko 6119Cproducerarchive filingno dates given1969stands alone
Seiko 6138Aproducerarchive filingno dates given1970stands alone
Seiko 6138Bproducerarchive filingno dates given1972stands alone
Seiko 6139Aproducerarchive filingno dates given1969stands alone
Seiko 6139Bproducerarchive filingno dates given1972stands alone
Seiko 6206Bproducerarchive filingno dates given—stands alone
Seiko 6308Aproducerarchive filingno dates given1976stands alone
Seiko 6309Aproducerarchive filingno dates given—stands alone
Seiko 6310Aproducerarchive filingno dates given1976stands alone
Seiko 6319Aproducerarchive filingno dates given—stands alone
Seiko 6347Aproducerarchive filingno dates given—stands alone
Seiko 6349Aproducerarchive filingno dates given—stands alone
Seiko 6601Aproducerarchive filingno dates given1961stands alone
Seiko 6601Bproducerarchive filingno dates given—stands alone
Seiko 6602Bproducerarchive filingno dates given—stands alone
Seiko 6606Bproducerarchive filingno dates given—stands alone
Seiko 6619Aproducerarchive filingno dates given—stands alone
Seiko 7001Aproducerarchive filingno dates given—stands alone
Seiko 7002Aproducerarchive filingno dates given—stands alone
Seiko 7005Aproducerarchive filingno dates given1969stands alone
Seiko 7006Aproducerarchive filingno dates given1970stands alone
Seiko 7009Aproducerarchive filingno dates given—stands alone
Seiko 7015Aproducerarchive filingno dates given1971stands alone
Seiko 7016Aproducerarchive filingno dates given1976stands alone
Seiko 7017Aproducerarchive filingno dates given1971stands alone
Seiko 7018Aproducerarchive filingno dates given1971stands alone
Seiko 7018Bproducerarchive filingno dates given—stands alone
Seiko 7019Aproducerarchive filingno dates given1974stands alone
Seiko 7039Aproducerarchive filingno dates given—stands alone
Seiko 7625Dproducerarchive filingno dates given1964stands alone

Sources

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