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:silvana-1180/unknown
accepteddisputed
movement
Silvana 1180 (Venus 180)
⟨1950 or earlier⟩ range only — no source gives an introduction yearread from sources · staged
not after 1950
a dated example movement, ca. 1945 (+5 yr, the source says “circa”)“ca. 1945: - Venus 180”
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
Silvana 1180 (Venus 180)
movement
IIDesignations — 0 names
No designation is recorded for this design yet.
IIIExecutions — 1 article
No source in this corpus states which grade any Silvana 1180 (Venus 180) 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 | Ranfft data sheet, the 15-jewel member of its 15/17 range | staged | |
Jewels build.jewel_count | 17 | Ranfft data sheet, the 17-jewel member of its 15/17 range | staged | |
Seconds display disp.seconds_display | small | — | staged | |
Movement diameter geom.diameter_mm | 23.3 mm | — | staged | |
Movement height geom.height_mm | 3.85 mm | — | staged | |
Frequency osc.frequency_vph | 18000 vph | — | staged | |
Power reserve (typical) power.reserve_typical_h | 40 h | — | staged | |
Winding mode wind.mode | manual | — | staged |
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 · 1
Where this construction came from. Read up the arrows.
- Venus 180ébauche 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/20230901232857/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Silvana_1180archivetier 2retrieved 2023-09-0110 facts on this page