CALIBER/browser
CORPUS EXPORT · 12269 calibers · 59387 family views · round round/2026-09-08Compiled from app/public/data/ · corpus 70c0140eba.
Family treeBulova 2180 — Heritage family: 2 calibers, 1 sourced lineage link.Drag to explore.
100%overlaydrag to pan · hover a caliber to isolate its line · scroll the page normallyopen the full family view →
ébauche ofBulova 2180 — the caliber this page is aboutBulova 21801967Bulova1 exec · grade ?Universal 51 (Bulova 2180) — open caliber pageUniversal 51 (Bulova 218…1968maker not sourced1 exec · grade ?
accepteddisputed
Sense of “family”Heritage · 2Everything (debug) · 2Parts cluster (Jules Borel sense) · 1Manufacturer-internal (Ranfft sense) · 1Based-on star (WatchBase sense) · 2Open the full family view →

movement

Bulova 2180

Bulovaarchive filingintroduced 1967design:bulova-2180compare specs · 2

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
Bulova 2180
movementproducer: Bulovaarchive filing
IIDesignations — 0 names

No designation is recorded for this design yet.

IIIExecutions — 1 article

No source in this corpus states which grade any Bulova 2180 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:bulova-2180/unknown

Specifications

PropertyValueScopeStatusSources
Jewels
build.jewel_count
13—staged
Seconds display
disp.seconds_display
central—staged
Casing diameter
geom.casing_diameter_mm
28.75 mm—staged
Movement diameter
geom.diameter_mm
28.75 mm—staged
Movement height
geom.height_mm
4.9 mm—staged
Frequency
osc.frequency_vph
2592000 vph—staged
Introduced
prod.intro_year
1967—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 · 0

Where this construction came from. Read up the arrows.

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.

Curated family labels

Bulova family/generations block
authority: ranfft16 members

Sources

  1. 1
    Internet Archive
    https://web.archive.org/web/20230906021048/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Bulova_2180&
    archivetier 2retrieved 2023-09-069 facts on this page
  2. 2
    Internet Archive
    https://web.archive.org/web/20210608222938/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Bulova_2180F
    archivetier 2retrieved 2021-06-081 fact on this page
  3. 3
    Internet Archive
    https://web.archive.org/web/20230906020841/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Bulova_218&
    archivetier 2retrieved 2023-09-061 fact on this page
  4. 4
    Internet Archive
    https://web.archive.org/web/20230906021852/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Bulova_2181G&
    archivetier 2retrieved 2023-09-061 fact on this page
  5. 5
    Internet Archive
    https://web.archive.org/web/20181108090329/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Universal_51_0
    archivetier 2retrieved 2018-11-081 fact on this page