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

Bulova 5BD

Bulovaarchive filingintroduced 1972design:bulova-5bdcompare specs

bounding evidence — no range is drawn on the era axis

not after 1972

a dated example movement, 1972“1972: N2, Bulova Watch Co, 23 Jewels; Kif-Ultraflex”

not after 1972

a dated example movement, 1972“1972: N2, Bulova Watch Co, 23 Jewels; Kif-Ultraflex”

not after 1972

a dated example movement, 1972“1972: N2, Bulova Watch Co, 23 Jewels; Kif-Ultraflex”

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 5BD

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 5BD 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-5bd/unknown

Specifications

Property	Value	Scope	Status
Jewels build.jewel_count	21	Ranfft data sheet, the 21-jewel member of its 21/23 range	staged
Jewels build.jewel_count	23	Ranfft data sheet, the 23-jewel member of its 21/23 range	staged
Movement shape build.shape	rectangular	—	staged
Movement height geom.height_mm	3.1 mm	—	staged
Frequency osc.frequency_vph	21600 vph	—	staged
Shock protection osc.shock_protection	kif	example movement, 1972	staged
Power reserve (typical) power.reserve_typical_h	43 h	—	staged
Introduced prod.intro_year	1972	—	staged
Winding mode wind.mode	manual	—	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 · 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 · 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: ranfft8 members

Sources

1
Internet Archive
https://web.archive.org/web/20230906033907/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Bulova_5BD&
archivetier 2retrieved 2023-09-0611 facts on this page
2
Internet Archive
https://web.archive.org/web/20230906032014/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Bulova_5AD&
archivetier 2retrieved 2023-09-061 fact on this page
3
Internet Archive
https://web.archive.org/web/20230906032643/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Bulova_5AH&
archivetier 2retrieved 2023-09-061 fact on this page
4
Internet Archive
https://web.archive.org/web/20230906032901/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Bulova_5AN&
archivetier 2retrieved 2023-09-061 fact on this page
5
Internet Archive
https://web.archive.org/web/20230906033234/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Bulova_5AR&
archivetier 2retrieved 2023-09-061 fact on this page
6
Internet Archive
https://web.archive.org/web/20230906033451/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Bulova_5BA&
archivetier 2retrieved 2023-09-061 fact on this page
7
Internet Archive
https://web.archive.org/web/20230906033702/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Bulova_5BC&
archivetier 2retrieved 2023-09-061 fact on this page