unknownsynthetic
evidence: unknown
no source states which grade this article was bought at — this row exists so 'unknown' stays countable instead of becoming an assumption
exec:miyota-8215/unknown
accepteddisputed
movement
Miyota 8215
bounding evidence — no range is drawn on the era axis
not after 2006
a dated example movement, 2006“2006: Miyota Co. Japan, 21 Jewels; Parashock”
Identity
A caliber is three separate things and this reference keeps them apart: the construction, the names it is sold under, and the article a brand actually bought. A watch model points at an execution — never at a bare construction — which is why “same caliber” is almost never a complete answer.
IDesign — the construction
Miyota 8215
movementproducer: Miyota
IIDesignations — 0 names
No designation is recorded for this design yet.
IIIExecutions — 1 article
No source in this corpus states which grade any Miyota 8215 was bought at. That unknown is stored as a real row rather than left blank, so it can be counted, filtered and excluded from any comparison that would otherwise assume parity.
Specifications
| Property | Value | Scope | Status | Sources |
|---|---|---|---|---|
Jewels build.jewel_count | 21 | — | accepted | |
Movement height geom.height_mm | 5.67 mm | — | accepted | |
Frequency osc.frequency_vph | 21600 vph | — | accepted | |
Power reserve (typical) power.reserve_typical_h | 42 h | — | accepted | |
Product family prod.family_name | Standard Automatic | — | accepted | |
Introduced prod.intro_year | 1977 | — | accepted |
Lineage
The same relationships as the tree at the top of this page, with their sources. An absence in a column means no source stated one.
Ancestors · 0
Where this construction came from. Read up the arrows.
None recorded. An absence here means no source stated one, not that none exists.
Descendants · 1
What came from it — revisions, variants, clones, licensed copies.
- Луч 2616Мderived from
Related · 0
Stored in a different table from descent. A successor is not a child.
None recorded. An absence here means no source stated one, not that none exists.
Used by
11
models
9
brands
11
grade unknown
grain 11 model — every record here sits at the same level, so the count is one kind of thing.
- Timex3 modelsmodel:timex/expedition-north-titanium-automatic-41mmmodel:timex/marlin-automaticmodel:timex/mk1-automatic
- AVI-81 modelmodel:avi-8/flyboy-eagle-squadron-automatic-bronze-85th-le
- Caravelle1 modelmodel:caravelle/sea-hunter
- Casio1 modelmodel:casio/edifice-efk-110
- Montford Watch Company1 modelmodel:montford-watch-company/rubus
- Semicolon1 modelmodel:semicolon/anachron
- Solar Lab Co.1 modelmodel:solar-lab-co/umbra
- Sternglas1 modelmodel:sternglas/hamburg-automatik-neugraphit
- Trifoglio Italia1 modelmodel:trifoglio-italia/veloce
Every brand here is on the strength of a source that names a watch and states this movement. Brands that use this caliber and nobody has sourced yet are absent — this is what has been researched, not what exists.
Sources
- 1Miyota (Citizen)https://miyotamovement.com/product/?page=5manufacturertier 1retrieved 2026-08-281 fact on this page
- 2chinesewatchwiki.nethttps://chinesewatchwiki.net/Clone_movementswikitier 3retrieved 2026-08-241 fact on this page
- 3Miyota (Citizen)https://miyotamovement.com/product/8215/manufacturertier 1retrieved 2026-08-285 facts on this page
- 4Monochrome Watcheshttps://monochrome-watches.com/introducing-montford-watch-company-rubus-field-watch-charity-tusk-foundation-specs-price/presstier 2retrieved 2026-08-251 fact on this page
- 5Internet Archivehttps://web.archive.org/web/20230214154253/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&Miyota_8215archivetier 2retrieved 2023-02-141 fact on this page
- 6luch.byhttps://luch.by/kollektsii/feniks-3-0/929530078/manufacturertier 1retrieved 2026-08-281 fact on this page