CALIBER/browser
CORPUS EXPORT · 12269 calibers · 59387 family views · round round/2026-09-08Compiled from app/public/data/ · corpus 70c0140eba.

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.

Open the full family view →

movement

Ronda 1239-21

Ronda AGarchive filingyear not sourceddesign:ronda-1239-21compare specs
bounding evidence — no range is drawn on the era axis
not after 1980
a dated example movement, ca. 1975 (+5 yr, the source says “circa”)“ca. 1975: RAX, Ronda-Matic, Sicura SA, Swiss, 17 Jewels; Kif-Protechoc”
not after 1980
a dated example movement, ca. 1975 (+5 yr, the source says “circa”)“ca. 1975: RAX, 1239-21, Ronda-Matic, Sicura SA, Swiss, 17 Jewels; Kif-Protechoc”
not after 1980
a dated example movement, ca. 1975 (+5 yr, the source says “circa”)“ca. 1975: RAX, Ronda-Matic, Sicura SA, Swiss, 17 Jewels; Kif-Protechoc”
not after 1980
a dated example movement, ca. 1975 (+5 yr, the source says “circa”)“ca. 1975: RAX, 1239-21, Ronda-Matic, Sicura SA, Swiss, 17 Jewels; Kif-Protechoc”
not after 1980
a dated example movement, ca. 1975 (+5 yr, the source says “circa”)“ca. 1975: RAX, 1239-21, Ronda-Matic, Sicura SA, Swiss, 17 Jewels; Kif-Protechoc”
not after 1980
a dated example movement, ca. 1975 (+5 yr, the source says “circa”)“ca. 1975: RAX, 1239-21, Ronda-Matic, Sicura SA, Swiss, 17 Jewels; Kif-Protechoc”
not after 1980
a dated example movement, ca. 1975 (+5 yr, the source says “circa”)“ca. 1975: RAX, Ronda-Matic, Sicura SA, Swiss, 17 Jewels; Kif-Protechoc”
not after 1980
a dated example movement, ca. 1975 (+5 yr, the source says “circa”)“ca. 1975: RAX, 1239-21, Ronda-Matic, Sicura SA, Swiss, 17 Jewels; Kif-Protechoc”
not after 1980
a dated example movement, ca. 1975 (+5 yr, the source says “circa”)“ca. 1975: RAX, 1239-21, Ronda-Matic, Sicura SA, Swiss, 17 Jewels; Kif-Protechoc”

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
Ronda 1239-21
movementproducer: Ronda AGarchive filing
IIDesignations — 0 names

No designation is recorded for this design yet.

IIIExecutions — 1 article

No source in this corpus states which grade any Ronda 1239-21 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:ronda-1239-21/unknown

Specifications

PropertyValueScopeStatusSources
Jewels
build.jewel_count
17—staged
Date correction
disp.date_quickset
crown—staged
Date
disp.has_date
yes—staged
Day
disp.has_day
yes—staged
Seconds display
disp.seconds_display
central—staged
Casing diameter
geom.casing_diameter_mm
27 mm—staged
Movement diameter
geom.diameter_mm
26.6 mm—staged
Movement height
geom.height_mm
6.4 mm—staged
Frequency
osc.frequency_vph
21600 vph—staged
Shock protection
osc.shock_protection
kifexample movement, 1975staged
Winding mode
wind.mode
automatic—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.

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

Ronda family/generations block
authority: ranfft37 members

Sources

  1. 1
    Internet Archive
    https://web.archive.org/web/20230901224724/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Ronda_1239_21
    archivetier 2retrieved 2023-09-0113 facts on this page
  2. 2
    Internet Archive
    https://web.archive.org/web/20230901224019/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Ronda_1013_21
    archivetier 2retrieved 2023-09-011 fact on this page
  3. 3
    Internet Archive
    https://web.archive.org/web/20230901224214/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Ronda_1035_21
    archivetier 2retrieved 2023-09-011 fact on this page
  4. 4
    Internet Archive
    https://web.archive.org/web/20230901224240/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Ronda_1037_21
    archivetier 2retrieved 2023-09-011 fact on this page
  5. 5
    Internet Archive
    https://web.archive.org/web/20230901224303/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Ronda_1113_21
    archivetier 2retrieved 2023-09-011 fact on this page
  6. 6
    Internet Archive
    https://web.archive.org/web/20171031022052/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&177&2uswk&Ronda_1216_21
    archivetier 2retrieved 2017-10-311 fact on this page
  7. 7
    Internet Archive
    https://web.archive.org/web/20171031022137/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&177&2uswk&Ronda_1286_21
    archivetier 2retrieved 2017-10-311 fact on this page
  8. 8
    Internet Archive
    https://web.archive.org/web/20171031022058/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&177&2uswk&Ronda_1218_21
    archivetier 2retrieved 2017-10-311 fact on this page
  9. 9
    Internet Archive
    https://web.archive.org/web/20171031022100/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&177&2uswk&Ronda_1219_21
    archivetier 2retrieved 2017-10-311 fact on this page
  10. 10
    Internet Archive
    https://web.archive.org/web/20171031022133/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&177&2uswk&Ronda_1246_21
    archivetier 2retrieved 2017-10-311 fact on this page
  11. 11
    Internet Archive
    https://web.archive.org/web/20230901224614/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Ronda_1226_21
    archivetier 2retrieved 2023-09-011 fact on this page
  12. 12
    Internet Archive
    https://web.archive.org/web/20230901224719/http://ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Ronda_1238_21
    archivetier 2retrieved 2023-09-011 fact on this page
  13. 13
    Internet Archive
    https://web.archive.org/web/20171031022119/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&177&2uswk&Ronda_1236_21
    archivetier 2retrieved 2017-10-311 fact on this page