Family treeBulova 12ECAD (Buren 1281) — Heritage family: 22 calibers, 21 sourced lineage links.Drag to explore.

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accepteddisputed

Sense of “family”Heritage · 22Everything (debug) · 22 Parts cluster (Jules Borel sense) · 1 Manufacturer-internal (Ranfft sense) · 1 Based-on star (WatchBase sense) · 4 Open the full family view →

movement

Bulova 12ECAD (Buren 1281)

maker not sourcedintroduced 1965design:bulova-12ecadcompare 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

movement

IIDesignations — 0 names

No designation is recorded for this design yet.

IIIExecutions — 1 article

No source in this corpus states which grade any Bulova 12ECAD (Buren 1281) 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-12ecad/unknown

Specifications

Property	Value	Scope	Status
Jewels build.jewel_count	17	Ranfft data sheet, the 17-jewel member of its 17/30 range	staged
Jewels build.jewel_count	30	Ranfft data sheet, the 30-jewel member of its 17/30 range	staged
Date correction disp.date_quickset	none	—	staged
Date disp.has_date	yes	—	staged
Casing diameter geom.casing_diameter_mm	28.5 mm	—	staged
Movement diameter geom.diameter_mm	28.15 mm	—	staged
Movement height geom.height_mm	3.25 mm	—	staged
Frequency osc.frequency_vph	19800 vph	—	staged
Shock protection osc.shock_protection	incabloc	example movement, 1965	staged
Power reserve (typical) power.reserve_typical_h	54 h	—	staged
Introduced prod.intro_year	1965	—	staged
Winding mode wind.mode	automatic	—	staged

Where a property carries more than one value, the values have different scopes — an official spec sheet and observed hardware, say. Different scopes are not a disagreement, so both are accepted and both are shown with the scope they apply to.

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.

Buren 1281
ébauche 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

1
Internet Archive
https://web.archive.org/web/20230906015125/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Bulova_12ECAD&
archivetier 2retrieved 2023-09-0613 facts on this page
2
Internet Archive
https://web.archive.org/web/20181106112747/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&BM_12810
archivetier 2retrieved 2018-11-061 fact on this page
3
Internet Archive
https://web.archive.org/web/20230905231833/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Breitling_11&
archivetier 2retrieved 2023-09-051 fact on this page
4
Internet Archive
https://web.archive.org/web/20230905231943/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Breitling_12&
archivetier 2retrieved 2023-09-051 fact on this page
5
Internet Archive
https://web.archive.org/web/20230905232155/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Breitling_14&
archivetier 2retrieved 2023-09-051 fact on this page
6
Internet Archive
https://web.archive.org/web/20181106113542/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Breitling_15
archivetier 2retrieved 2018-11-061 fact on this page
7
Internet Archive
https://web.archive.org/web/20230906015305/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Bulova_14EFAD&
archivetier 2retrieved 2023-09-061 fact on this page
8
Internet Archive
https://web.archive.org/web/20191023213758/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Buren_11
archivetier 2retrieved 2019-10-231 fact on this page
9
Internet Archive
https://web.archive.org/web/20230921212550/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&69&2uswk&Buren_12
archivetier 2retrieved 2023-09-211 fact on this page
10
Internet Archive
https://web.archive.org/web/20230930230758/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&69&2uswk&Buren_14
archivetier 2retrieved 2023-09-301 fact on this page
11
Internet Archive
https://web.archive.org/web/20191021131014/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Buren_15
archivetier 2retrieved 2019-10-211 fact on this page
12
Internet Archive
https://web.archive.org/web/20230907001152/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Dugena_1281&
archivetier 2retrieved 2023-09-071 fact on this page
13
Internet Archive
https://web.archive.org/web/20191122134302/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Dugena_3207
archivetier 2retrieved 2019-11-221 fact on this page
14
Internet Archive
https://web.archive.org/web/20191120033549/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Hamilton_11
archivetier 2retrieved 2019-11-201 fact on this page
15
Internet Archive
https://web.archive.org/web/20181107162250/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Hamilton_12
archivetier 2retrieved 2018-11-071 fact on this page
16
Internet Archive
https://web.archive.org/web/20181107162312/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Hamilton_15
archivetier 2retrieved 2018-11-071 fact on this page
17
Internet Archive
https://web.archive.org/web/20220816073511/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Heuer_11
archivetier 2retrieved 2022-08-161 fact on this page
18
Internet Archive
https://web.archive.org/web/20211130161015/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&Heuer_12
archivetier 2retrieved 2021-11-301 fact on this page
19
Internet Archive
https://web.archive.org/web/20181107170400/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&Heuer_14
archivetier 2retrieved 2018-11-071 fact on this page
20
Internet Archive
https://web.archive.org/web/20200926051817/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Heuer_15
archivetier 2retrieved 2020-09-261 fact on this page
21
Internet Archive
https://web.archive.org/web/20191114094259/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Junghans_688_13
archivetier 2retrieved 2019-11-141 fact on this page