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Watchmaker profile

Pim Koeslag

Pim Koeslag translated the historical CVDK planetarium drawings into 3D CAD for the Grand Planetarium Eccentric Manufacture, alongside the separately credited concept and watch designers. 2

First-party project credits separate CAD development from Christiaan’s concept and Daniël/Maria’s design. No sole invention, total component-origin or independent calibre-count claim.

At a glance

Dates
1981–? 11981 explicitly stated by CVDK’s company history.

The watchmaking story

A useful place to start with Pim Koeslag's work is CVDK Grand Planetarium Eccentric Manufacture (2024). 2

Sources associate Pim Koeslag with Frederique Constant and Ateliers de Monaco, although the precise role remains unresolved. 123

Pim Koeslag designed, developed or supplied work for Christiaan van der Klaauw. 123

Scope: Direct watchmaking

Why this person is included

Documented attributable individual contribution

Background and working context

Affiliations and workshops: Frederique Constant; Ateliers de Monaco; Christiaan van der Klaauw 1

Documented origin: Almelo, Netherlands 1

Geographic ties: Netherlands; Switzerland. Documented workplace / project location; not a citizenship assertion 1

Brands, workshops, and other relationships

  1. Watch brand / watchmaking business · Inherited source-linked record; relationship classification reviewed, sources not reopened

    Frederique Constant — Association — role unresolved. Watchmaker / movement developer 123

    Legacy affiliation: Frederique Constant; Ateliers de Monaco; Christiaan van der Klaauw. Person-level contribution: Translated the historical CVDK planetarium drawings into 3D CAD for the Grand Planetarium Eccentric Manufacture, alongside the separately credited concept and watch designers.

    Original affiliation wording: Frederique Constant; Ateliers de Monaco; Christiaan van der Klaauw. No present-day employment or ownership inferred.

  2. Watchmaking workshop / practice · Inherited source-linked record; relationship classification reviewed, sources not reopened

    Ateliers de Monaco — Association — role unresolved. Watchmaker / movement developer 123

    Legacy affiliation: Frederique Constant; Ateliers de Monaco; Christiaan van der Klaauw. Person-level contribution: Translated the historical CVDK planetarium drawings into 3D CAD for the Grand Planetarium Eccentric Manufacture, alongside the separately credited concept and watch designers.

    Original affiliation wording: Frederique Constant; Ateliers de Monaco; Christiaan van der Klaauw. No present-day employment or ownership inferred.

  3. Watch brand / watchmaking business · Inherited source-linked record; relationship classification reviewed, sources not reopened

    Christiaan van der Klaauw — Designed / developed / supplied for. 3D CAD translation of historical planetarium drawings; 2024 Grand Planetarium Eccentric Manufacture 123

    Legacy affiliation: Frederique Constant; Ateliers de Monaco; Christiaan van der Klaauw. Person-level contribution: Translated the historical CVDK planetarium drawings into 3D CAD for the Grand Planetarium Eccentric Manufacture, alongside the separately credited concept and watch designers.

    Original affiliation wording: Frederique Constant; Ateliers de Monaco; Christiaan van der Klaauw. No present-day employment or ownership inferred.

Evidence and limitations

This dossier connects 9 field-specific evidence records with 3 public sources. Known links only; full career not established; unresolved relationship(s) remain

Claim qualifications (9)
  • Full name: House history distinguishes founder's work from successors. Its AHCI honorary date 1989 differs from AHCI member record 1990; both retained with scope, not silently harmonised. 1
  • Documented origin: House history distinguishes founder's work from successors. Its AHCI honorary date 1989 differs from AHCI member record 1990; both retained with scope, not silently harmonised. 1
  • Birth year: House history distinguishes founder's work from successors. Its AHCI honorary date 1989 differs from AHCI member record 1990; both retained with scope, not silently harmonised. 1
  • Affiliations / workshops: House history distinguishes founder's work from successors. Its AHCI honorary date 1989 differs from AHCI member record 1990; both retained with scope, not silently harmonised. 1
  • Geographic ties: House history distinguishes founder's work from successors. Its AHCI honorary date 1989 differs from AHCI member record 1990; both retained with scope, not silently harmonised. 1
  • Specific role: House history distinguishes founder's work from successors. Its AHCI honorary date 1989 differs from AHCI member record 1990; both retained with scope, not silently harmonised. 1
  • Primary geography: House history distinguishes founder's work from successors. Its AHCI honorary date 1989 differs from AHCI member record 1990; both retained with scope, not silently harmonised. 1
  • Noteworthy contribution: Manufacturer assigns concept, watch design and CAD development separately. Marketing superlatives and total component-origin claims are not adopted. 2
  • Representative work: Manufacturer assigns concept, watch design and CAD development separately. Marketing superlatives and total component-origin claims are not adopted. 2

Sources

  1. History: Christiaan van der Klaauw and successive workshop leadershipChristiaan van der Klaauw Astronomical Watches · First-party / official · Not stated

    [S0198] Christiaan van der Klaauw Astronomical Watches. "History: Christiaan van der Klaauw and successive workshop leadership." Not stated. https://www.klaauw.com/eng/history Accessed 2026-09-13.

    Source context

    Relationship to subject: House or maker associated with subject

    How it was checked: Opened — relevant text inspected. Pim Koeslag, Daniël Reintjes and Maria Reintjes biographies; January 2025 transition

    Limitation: Company history supplies dates and roles; not independent civil or employment records. No current appointment is inferred from older episodes.

  2. CVDK Grand Planetarium Eccentric Manufacture CKGP1104Not stated · Christiaan van der Klaauw Astronomical Watches · First-party biography / project record · 2024 project narrative; page publication date not stated

    [S0328] Christiaan van der Klaauw Astronomical Watches. "CVDK Grand Planetarium Eccentric Manufacture CKGP1104." 2024 project narrative; page publication date not stated. https://www.klaauw.com/eng/cvdk-grand-planetarium-eccentric-manufacture-ckgp1104 Accessed 2026-09-13. Locator: Created by 3 generations of CVDK; 1995 clock concept and 2024 watch.

    Source context

    Relationship to subject: Subject or affiliated organization

    How it was checked: Opened — relevant text inspected. Created by 3 generations of CVDK; 1995 clock concept and 2024 watch

    Limitation: Manufacturer assigns concept, watch design and CAD development separately. Marketing superlatives and total component-origin claims are not adopted.

  3. https://www.klaauw.com/eng/history https://www.klaauw.com/eng/cvdk-grand-planetarium-eccentric-manufacture-ckgp1104linked source

Corrections and stronger evidence

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