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

ETA 2734R

ETA SA Manufacture Horlogère Suissearchive filingintroduced 1969design:eta-2734rcompare specs
bounding evidence — no range is drawn on the era axis
not after 1975
a dated example movement, ca. 1970 (+5 yr, the source says “circa”)“1-3) ca. 1970: DRP (RP in D) - Patented; Incabloc”
not after 1975
a dated example movement, ca. 1970 (+5 yr, the source says “circa”)“1-3) ca. 1970: DRP (RP in D) - Patented; Incabloc”
not after 1975
a dated example movement, ca. 1970 (+5 yr, the source says “circa”)“1-2) ca. 1970: DRP (RP in D) - Patented; Incabloc”
not after 1975
a dated example movement, ca. 1970 (+5 yr, the source says “circa”)“1-2) ca. 1970: DRP (RP in D) - Patented; Incabloc”
not after 1975
a dated example movement, ca. 1970 (+5 yr, the source says “circa”)“1-2) ca. 1970: DRP (RP in D) - Patented; Incabloc”

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
ETA 2734R
movementproducer: ETA SA Manufacture Horlogère Suissearchive filing
IIDesignations — 0 names

No designation is recorded for this design yet.

IIIExecutions — 1 article

No source in this corpus states which grade any ETA 2734R 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:eta-2734r/unknown

Specifications

PropertyValueScopeStatusSources
Jewels
build.jewel_count
21Ranfft data sheet, the 21-jewel member of its 21/25 rangestaged
Jewels
build.jewel_count
25Ranfft data sheet, the 25-jewel member of its 21/25 rangestaged
Date correction
disp.date_quickset
crown—staged
Date
disp.has_date
yes—staged
Seconds display
disp.seconds_display
central—staged
Casing diameter
geom.casing_diameter_mm
26 mm—staged
Movement diameter
geom.diameter_mm
25.6 mm—staged
Movement height
geom.height_mm
4.65 mm—staged
Frequency
osc.frequency_vph
36000 vph—staged
Shock protection
osc.shock_protection
incablocexample movement, 1970staged
Power reserve (typical)
power.reserve_typical_h
44 h—staged
Discontinued
prod.discontinued_year
1972—staged
Introduced
prod.intro_year
1969—staged
Production volume
prod.volume_count
18000—staged
Hacking seconds
wind.has_hacking_seconds
yesoptional executionstaged
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 · 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

ETA family/generations block
authority: ranfft55 members

Sources

  1. 1
    Internet Archive
    https://web.archive.org/web/20181107095026/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&ETA_2734R
    archivetier 2retrieved 2018-11-0718 facts on this page
  2. 2
    Internet Archive
    https://web.archive.org/web/20191114092249/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&ETA_2722R
    archivetier 2retrieved 2019-11-141 fact on this page
  3. 3
    Internet Archive
    https://web.archive.org/web/20191117152623/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&ETA_2724R
    archivetier 2retrieved 2019-11-171 fact on this page
  4. 4
    Internet Archive
    https://web.archive.org/web/20201027030100/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&ETA_2520R
    archivetier 2retrieved 2020-10-271 fact on this page
  5. 5
    Internet Archive
    https://web.archive.org/web/20211206083556/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&ETA_2522
    archivetier 2retrieved 2021-12-061 fact on this page
  6. 6
    Internet Archive
    https://web.archive.org/web/20220704145145/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&ae&2uswk&ETA_2734
    archivetier 2retrieved 2022-07-041 fact on this page
  7. 7
    Internet Archive
    https://web.archive.org/web/20181107094951/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&ETA_2732
    archivetier 2retrieved 2018-11-071 fact on this page
  8. 8
    Internet Archive
    https://web.archive.org/web/20181107095038/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a0&2uswk&ETA_2738
    archivetier 2retrieved 2018-11-071 fact on this page
  9. 9
    Internet Archive
    https://web.archive.org/web/20191112182445/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&ETA_2732R
    archivetier 2retrieved 2019-11-121 fact on this page