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:longines-310/unknown
accepteddisputed
movement
Longines 310 (Frederic Piguet 21)
bounding evidence — no range is drawn on the era axis
not after 1965
a dated example movement, ca. 1960 (+5 yr, the source says “circa”)“ca. 1960: Bucherer, Swiss, 3 Adj, 17 Jewels”
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
Longines 310 (Frederic Piguet 21)
movement
IIDesignations — 0 names
No designation is recorded for this design yet.
IIIExecutions — 1 article
No source in this corpus states which grade any Longines 310 (Frederic Piguet 21) 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 | 18 | — | staged | |
Casing diameter geom.casing_diameter_mm | 20.8 mm | — | staged | |
Movement diameter geom.diameter_mm | 20.4 mm | — | staged | |
Movement height geom.height_mm | 1.73 mm | — | staged | |
Frequency osc.frequency_vph | 18000 vph | — | staged | |
Power reserve (typical) power.reserve_typical_h | 42 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.
- Frederic Piguet 21ébauche 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/20171031000001/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&142&2uswk&Longines_310archivetier 2retrieved 2017-10-319 facts on this page
- 2Internet Archivehttps://web.archive.org/web/20200808233038/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Blancpain_21archivetier 2retrieved 2020-08-081 fact on this page
- 3Internet Archivehttps://web.archive.org/web/20230906060831/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Cartier_21&archivetier 2retrieved 2023-09-061 fact on this page
- 4Internet Archivehttps://web.archive.org/web/20181106121238/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Certina_20_10archivetier 2retrieved 2018-11-061 fact on this page
- 5Internet Archivehttps://web.archive.org/web/20171031011326/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&159&2uswk&Omega_700archivetier 2retrieved 2017-10-311 fact on this page
- 6Internet Archivehttps://web.archive.org/web/20230902014748/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Zenith_53_5archivetier 2retrieved 2023-09-021 fact on this page