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:gruen-877/unknown
accepteddisputed
movement
Gruen 877 (Rolex 300)
bounding evidence — no range is drawn on the era axis
not after 1940
a dated example movement, ca. 1935 (+5 yr, the source says “circa”)“ca. 1935: Rolex Hairspring, Timed 6 Positions, Observatory Quality, Swiss Made, 15 Rubis”
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
Gruen 877 (Rolex 300)
movement
IIDesignations — 0 names
No designation is recorded for this design yet.
IIIExecutions — 1 article
No source in this corpus states which grade any Gruen 877 (Rolex 300) 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 | |
Movement shape build.shape | rectangular | — | staged | |
Seconds display disp.seconds_display | small | — | staged | |
Frequency osc.frequency_vph | 18000 vph | — | staged | |
Introduced prod.intro_year | 1928 | — | 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.
- Rolex 300 Princeébauche 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/20221228050858/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Gruen_877archivetier 2retrieved 2022-12-288 facts on this page
- 2Internet Archivehttps://web.archive.org/web/20230904041938/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Alpina_877&archivetier 2retrieved 2023-09-041 fact on this page