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:citizen-7804a/unknown
Family tree · none recorded
No lineage link to any other caliber is recorded for this design under the Heritage profile. That is a gap in the research, not a claim that none exists.
movement
Citizen 7804A
bounding evidence — no range is drawn on the era axis
not after 1974
a dated example movement, 1974“1974: Citizen, 7804A, Japan, 8 J.; Parashock”
not after 1974
a dated example movement, 1974“1974: Citizen, 7804A, Japan, 8 J.; Parashock”
not after 1974
a dated example movement, 1974“1974: Citizen, 7804A, Japan, 8 J.; 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
Citizen 7804A
movementproducer: Citizen Watch Co., Ltd.archive filing
IIDesignations — 0 names
No designation is recorded for this design yet.
IIIExecutions — 1 article
No source in this corpus states which grade any Citizen 7804A 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 | 8 | — | staged | |
Date correction disp.date_quickset | crown | — | staged | |
Date disp.has_date | yes | — | staged | |
Day disp.has_day | yes | — | staged | |
Seconds display disp.seconds_display | central | — | staged | |
Casing diameter geom.casing_diameter_mm | 28.8 mm | — | staged | |
Movement diameter geom.diameter_mm | 28.4 mm | — | staged | |
Movement height geom.height_mm | 5.9 mm | — | staged | |
Frequency osc.frequency_vph | 36000 vph | — | staged | |
Shock protection osc.shock_protection | parashock | example movement, 1974 | staged | |
Introduced prod.intro_year | 1972 | — | staged | |
Hacking seconds wind.has_hacking_seconds | yes | — | staged |
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 · 0
What came from it — revisions, variants, clones, licensed copies.
None recorded. An absence here means no source stated one, not that none exists.
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.
Sources
- 1Internet Archivehttps://web.archive.org/web/20181106123214/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Citizen_7804Aarchivetier 2retrieved 2018-11-0614 facts on this page
- 2Internet Archivehttps://web.archive.org/web/20181106123220/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Citizen_7806Aarchivetier 2retrieved 2018-11-061 fact on this page
- 3Internet Archivehttps://web.archive.org/web/20181106123202/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Citizen_7802Aarchivetier 2retrieved 2018-11-061 fact on this page