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:nomos-alpha/unknown
accepteddisputed
movement
NOMOS Alpha
bounding evidence — no range is drawn on the era axis
not after 2024
NOMOS DUW 4601 · introduced 2024 (sourced)
not before 1971
Peseux / ETA 7001 · introduced 1971 (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
NOMOS Alpha
movementproducer: NOMOS Glashütte
IIDesignations — 0 names
No designation is recorded for this design yet.
IIIExecutions — 1 article
No source in this corpus states which grade any NOMOS Alpha 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 |
|---|---|---|---|---|
Bridge layout build.bridge_layout | three_quarter | — | accepted | |
Jewels build.jewel_count | 17 | — | accepted | |
Seconds display disp.seconds_display | small | — | accepted | |
Movement diameter geom.diameter_mm | 23.3 mm | — | accepted | |
Movement height geom.height_mm | 2.6 mm | — | accepted | |
Swiss movement origin.swiss_movement | no | — | accepted | |
Frequency osc.frequency_vph | 21600 vph | — | accepted | |
Power reserve (typical) power.reserve_typical_h | 43 h | — | accepted | |
Introduced prod.intro_year | 2005 | — | accepted | |
Hacking seconds wind.has_hacking_seconds | yes | — | 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.
- Peseux / ETA 7001derived from
Descendants · 2
What came from it — revisions, variants, clones, licensed copies.
- NOMOS DUW 4001revision of
- NOMOS DUW 4601derived from
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
- 1Monochrome Watcheshttps://monochrome-watches.com/revisiting-the-most-classic-nomos-the-35mm-hand-wound-tangente-review-price/presstier 2retrieved 2026-08-2412 facts on this page
- 2Monochrome Watcheshttps://monochrome-watches.com/interview-uwe-ahrendt-nomos-glashutte-tangente-orion-ludwig-tetra-club-manufacture/presstier 2retrieved 2026-08-242 facts on this page
- 3Monochrome Watcheshttps://monochrome-watches.com/nomos-metro-38-date-duw-4601-hand-wound-price-review/presstier 2retrieved 2026-08-242 facts on this page
- 4Monochrome Watcheshttps://monochrome-watches.com/nomos-tangente-2date-new-hand-wound-calibre-duw-4601-in-house-movement-review-specs-price/presstier 2retrieved 2026-08-242 facts on this page
- 5Monochrome Watcheshttps://monochrome-watches.com/in-depth-history-eta-peseux-7001-hand-wound-classic-movement-technical-review/presstier 2retrieved 2026-08-241 fact on this page
- 6Monochrome Watcheshttps://monochrome-watches.com/first-look-nomos-tetra-origins-ochra-terra-salvia-basalt-duw-4001-specs-price-live-pics/presstier 2retrieved 2026-08-242 facts on this page
- 7Internet Archivehttps://web.archive.org/web/20191021024412/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Dugena_3807archivetier 2retrieved 2019-10-211 fact on this page
- 8Internet Archivehttps://web.archive.org/web/20220704151229/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&Girard-Perregaux_101archivetier 2retrieved 2022-07-041 fact on this page