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:zentra-50a/unknown
accepteddisputed
movement
ZentRa 50A (Felsa 107)
⟨1930 or earlier⟩ range only — no source gives an introduction yearread from sources · staged
not after 1930
a dated example movement, ca. 1925 (+5 yr, the source says “circa”)“1-2) ca. 1925: ZentRa 50A”
not after 1930
a dated example movement, ca. 1925 (+5 yr, the source says “circa”)“ca. 1925: ZentRa 50A”
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
ZentRa 50A (Felsa 107)
movement
IIDesignations — 0 names
No designation is recorded for this design yet.
IIIExecutions — 1 article
No source in this corpus states which grade any ZentRa 50A (Felsa 107) 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 | 15 | — | staged | |
Seconds display disp.seconds_display | small | — | staged | |
Casing diameter geom.casing_diameter_mm | 19.75 mm | — | staged | |
Movement diameter geom.diameter_mm | 19.45 mm | — | staged | |
Movement height geom.height_mm | 3.3 mm | — | staged | |
Frequency osc.frequency_vph | 18000 vph | — | staged | |
Power reserve (typical) power.reserve_typical_h | 33 h | — | staged | |
Winding mode wind.mode | manual | — | 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 · 1
Where this construction came from. Read up the arrows.
- Felsa 107ébauche 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.
Sources
- 1Internet Archivehttps://web.archive.org/web/20181108110937/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&ZentRa_50Aarchivetier 2retrieved 2018-11-0810 facts on this page
- 2Internet Archivehttps://web.archive.org/web/20211020233624/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&Felsa_107archivetier 2retrieved 2021-10-201 fact on this page
- 3Internet Archivehttps://web.archive.org/web/20200918103311/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Bifora_8_75archivetier 2retrieved 2020-09-181 fact on this page
- 4Internet Archivehttps://web.archive.org/web/20220813123053/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&Silena_8_75&archivetier 2retrieved 2022-08-131 fact on this page