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:certina-25-66m/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
Certina 25-66M
bounding evidence — no range is drawn on the era axis
not after 1975
a dated example movement, 1975“1975: Certina, 25-66, Swiss, 17 Jewels; Incabloc”
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
Certina 25-66M
movementproducer: Certinaarchive filing
IIDesignations — 0 names
No designation is recorded for this design yet.
IIIExecutions — 1 article
No source in this corpus states which grade any Certina 25-66M 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 | 17 | — | accepted | |
Seconds display disp.seconds_display | central | — | staged | |
Lift angle esc.lift_angle_deg | 50 deg | — | accepted | |
Casing diameter geom.casing_diameter_mm | 26 mm | — | staged | |
Movement diameter geom.diameter_mm | 25.6 mm | — | accepted | |
Movement height geom.height_mm | 3.85 mm | — | accepted | |
Swiss movement origin.swiss_movement | yes | — | accepted | |
Frequency osc.frequency_vph | 19800 vph | — | accepted | |
Hairspring geometry osc.hairspring_geometry | flat | — | accepted | |
Shock protection osc.shock_protection | incabloc | example movement, 1975 | staged | |
Power reserve (typical) power.reserve_typical_h | 42 h | — | accepted | |
Power reserve (typical) power.reserve_typical_h | 46 h | — | accepted | |
Discontinued prod.discontinued_year | 1977 | — | staged | |
Introduced prod.intro_year | 1975 | — | staged | |
Winding mode wind.mode | manual | — | accepted |
Where a property carries more than one value, the values have different scopes — an official spec sheet and observed hardware, say. Different scopes are not a disagreement, so both are accepted and both are shown with the scope they apply to.
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.
Curated family labels
Certina family/generations block
authority: ranfft15 members
Sources
- 1Internet Archivehttps://web.archive.org/web/20230906080026/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Certina_25_66M&archivetier 2retrieved 2023-09-0613 facts on this page
- 2Caliber Cornerhttps://calibercorner.com/certina-caliber-25-66mcurated dbtier 2retrieved 2026-09-089 facts on this pagecited, never crawled
- 3Internet Archivehttps://web.archive.org/web/20220528135652/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Certina_25_651archivetier 2retrieved 2022-05-281 fact on this page
- 4Internet Archivehttps://web.archive.org/web/20230906074152/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Certina_25_65&archivetier 2retrieved 2023-09-061 fact on this page
- 5Internet Archivehttps://web.archive.org/web/20230906075330/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Certina_25_66&archivetier 2retrieved 2023-09-061 fact on this page
- 6Internet Archivehttps://web.archive.org/web/20230930195235/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Certina_25_661archivetier 2retrieved 2023-09-301 fact on this page