unknown
evidence: unknowndecoration Lange manufacture finissage — hand-engraved balance cock, screwed gold chatons, thermally blued screws, Glashütte ribbing on untreated German silver
exec:lange-l951-6/lange
accepteddisputed
movement
A. Lange & Söhne L951.6
bounding evidence — no range is drawn on the era axis
not before 1999
A. Lange & Söhne L951.1 · introduced 1999 (sourced)
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
A. Lange & Söhne L951.6
movementproducer: A. Lange & Söhne
IIDesignations — 0 names
No designation is recorded for this design yet.
IIIExecutions — 2 articles
No source in this corpus states which grade any A. Lange & Söhne L951.6 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.
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:lange-l951-6/unknown
Specifications
| Property | Value | Scope | Status | Sources |
|---|---|---|---|---|
Total components build.component_count | 451 | — | accepted | |
Jewels build.jewel_count | 46 | — | accepted | |
Chronograph actuation cmpl.chrono_actuation | column_wheel | — | accepted | |
Chronograph cmpl.has_chronograph | yes | — | accepted | |
Flyback cmpl.has_flyback | yes | — | accepted | |
Date display disp.date_display_type | big_date | — | accepted | |
Power-reserve indicator disp.has_power_reserve_indicator | yes | — | accepted | |
Movement diameter geom.diameter_mm | 30 mm | — | accepted | |
Movement height geom.height_mm | 7.9 mm | — | accepted | |
Main-plate material mat.plate_material | german_silver | — | accepted | |
Swiss movement origin.swiss_movement | no | — | accepted | |
Frequency osc.frequency_vph | 18000 vph | — | accepted | |
Hairspring supplier osc.hairspring_supplier | agent:a-lange-sohne | — | accepted | |
Power reserve (typical) power.reserve_typical_h | 60 h | — | accepted | |
Introduced prod.intro_year | 2012 | — | accepted | |
Caliber supply type prod.supply_type | in_house | — | accepted | |
Winding mode wind.mode | manual | — | 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 · 1
Where this construction came from. Read up the arrows.
- A. Lange & Söhne L951.1revision 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.
Used by
1
models
1
brands
1
grade unknown
grain 1 reference — every record here sits at the same level, so the count is one kind of thing.
- A. Lange & Söhne1 modelmodel:a-lange-sohne/datograph-updown
Every brand here is on the strength of a source that names a watch and states this movement. Brands that use this caliber and nobody has sourced yet are absent — this is what has been researched, not what exists.
Sources
- 1alange-soehne.comhttps://www.alange-soehne.com/us-en/manufacture/art-of-watchmaking/manufacture-movementsmanufacturertier 1retrieved 2026-08-244 facts on this page
- 2alange-soehne.comhttps://www.alange-soehne.com/us-en/timepieces/saxonia/datograph-updown/datograph-updown-in-950-platinum-405-035manufacturertier 1retrieved 2026-08-247 facts on this page
- 3Monochrome Watcheshttps://monochrome-watches.com/in-depth-retrospective-a-lange-sohne-datograph-1999-until-now-complete-history-review-datograph-up-down-25th-anniversary/presstier 2retrieved 2026-08-249 facts on this page
- 4alange-soehne.comhttps://www.alange-soehne.com/us-en/manufacture/news-and-events/25-years-of-datographmanufacturertier 1retrieved 2026-08-244 facts on this page
- 5alange-soehne.comhttps://www.alange-soehne.com/us-en/manufacture/art-of-watchmaking/flyback-mechanismmanufacturertier 1retrieved 2026-08-241 fact on this page
- 6alange-soehne.comhttps://www.alange-soehne.com/us-en/timepieces/1815/1815-chronograph/1815-chronograph-in-750-white-gold-414-026manufacturertier 1retrieved 2026-08-241 fact on this page
- 7Monochrome Watcheshttps://monochrome-watches.com/a-lange-and-sohne-odysseus-chronograph-hands-on-review-specs-price/presstier 2retrieved 2026-08-241 fact on this page