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:dugena-1028/unknown
accepteddisputed
movement
Dugena 1028 (Helvetia 861, ETA 2522R)
bounding evidence — no range is drawn on the era axis
not after 1975
a dated example movement, ca. 1970 (+5 yr, the source says “circa”)“ca. 1970: Helvetia, Swiss Made, 25 Jewels - 4080, Patented; 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
Dugena 1028 (Helvetia 861, ETA 2522R)
movement
IIDesignations — 0 names
No designation is recorded for this design yet.
IIIExecutions — 1 article
No source in this corpus states which grade any Dugena 1028 (Helvetia 861, ETA 2522R) 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 | 25 | — | staged | |
Date correction disp.date_quickset | none | — | staged | |
Date disp.has_date | yes | — | staged | |
Seconds display disp.seconds_display | central | — | staged | |
Casing diameter geom.casing_diameter_mm | 26 mm | — | staged | |
Movement diameter geom.diameter_mm | 25.6 mm | — | staged | |
Movement height geom.height_mm | 4.6 mm | — | staged | |
Frequency osc.frequency_vph | 18000 vph | — | staged | |
Shock protection osc.shock_protection | incabloc | example movement, 1970 | staged | |
Power reserve (typical) power.reserve_typical_h | 48 h | — | staged | |
Winding mode wind.mode | automatic | — | 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 · 2
Where this construction came from. Read up the arrows.
- ETA 2522Rébauche of
- Helvetia 861 (ETA 2522R)ébauche of
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
Dugena family/generations block
authority: ranfft4 members
Sources
- 1Internet Archivehttps://web.archive.org/web/20230906225707/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Dugena_1028&archivetier 2retrieved 2023-09-0615 facts on this page
- 2Internet Archivehttps://web.archive.org/web/20191021225816/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Dugena_1069archivetier 2retrieved 2019-10-211 fact on this page
- 3Internet Archivehttps://web.archive.org/web/20230906225825/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Dugena_1029&archivetier 2retrieved 2023-09-061 fact on this page
- 4Internet Archivehttps://web.archive.org/web/20230907072452/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Dugena_999&archivetier 2retrieved 2023-09-071 fact on this page
- 5Internet Archivehttps://web.archive.org/web/20181107170135/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Helvetia_861archivetier 2retrieved 2018-11-071 fact on this page