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:stp-stp1-21/unknown
Family tree · none recorded
No lineage link to any other caliber is recorded for this design under the Heritage profile. That is a gap in the research, not a claim that none exists.
movement
STP1-21
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
STP1-21
movementproducer: Swiss Technology Production (STP)
IIDesignations — 0 names
No designation is recorded for this design yet.
IIIExecutions — 1 article
No source in this corpus states which grade any STP1-21 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 | 26 | — | accepted | |
Lift angle esc.lift_angle_deg | 50 deg | — | accepted | |
Movement diameter geom.diameter_mm | 26 mm | — | accepted | |
Movement height geom.height_mm | 4.6 mm | — | accepted | |
Swiss movement origin.swiss_movement | yes | — | accepted | |
Frequency osc.frequency_vph | 28800 vph | — | accepted | |
Power reserve (typical) power.reserve_typical_h | 41 h | — | accepted | |
Winding direction wind.direction | bidirectional | — | accepted | |
Hacking seconds wind.has_hacking_seconds | yes | — | accepted | |
Quickset date wind.has_quickset_date | yes | — | accepted | |
Winding mode wind.mode | automatic | — | accepted |
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 · 0
Where this construction came from. Read up the arrows.
None recorded. An absence here means no source stated one, not that none exists.
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 · 1
Stored in a different table from descent. A successor is not a child.
- STP1-11successor of
succession within the clone line itself; no parts continuity is asserted by the source
Sources
- 1Caliber Cornerhttps://calibercorner.com/stp-caliber-stp1-11/curated dbtier 2retrieved 2026-08-242 facts on this pagecited, never crawled
- 2Caliber Cornerhttps://calibercorner.com/swisstp-caliber-stp1-21curated dbtier 2retrieved 2026-09-0811 facts on this pagecited, never crawled