# Ateliers de Monaco

> Peter Stas, Pim Koeslag and Robert van Pappelendam co-founded Ateliers deMonaco in Monaco in 2008 to make tourbillons and minute repeaters. The company was wound up in 2014 as the brand moved to Plan-les-Ouates; Citizen agreed to buy it in 2016.

Canonical page: https://www.watchanchor.com/brand/ateliers-de-monaco

**Status: dormant.** Ateliers deMonaco has shown no new watches since about 2020, and in 2026 its website was replaced by a maintenance page, although its Swiss company is still registered with Citizen-group managers.

## About

- **Founded:** 2008
- **Founded in:** Monaco, Monaco
- **Based in:** Plan-les-Ouates, Switzerland
- **Founders:** Pim Koeslag, Peter Stas, Robert van Pappelendam

## In this catalogue

- **References listed:** 29
- **Case sizes:** 39–46 mm
- **Case materials:** 5
- **Movement types:** Automatic, Manual

## Note

Wikipedia says the brand was founded in 2008 in Plan-les-Ouates, but the 2008 company was a Monegasque SAM, 'Les Ateliers de Monaco S.A.M.', based at the Palais de la Scala in Monaco (Journal de Monaco, 6 March 2009). Its shareholders dissolved it with effect from 28 April 2014 and appointed Robert van Pappelendam liquidator. The Swiss company, Les Ateliers Demonaco Sàrl (CHE-237.592.116), was entered in the Geneva register on 16 April 2014. So the 2008 year and Monaco place describe the original company, and Plan-les-Ouates is where the business has been since 2014. The brand writes its name 'Ateliers deMonaco'. It was moved, not renamed or relaunched. The brand's own pages name Stas and Koeslag as co-founders; Wikipedia adds van Pappelendam. Zefix shows Stas transferring his 200 shares to Frederique Constant Holding in May 2016, the year Citizen announced its purchase.

## Sources

- [Ateliers deMonaco - Origins (Wayback, April 2026)](https://web.archive.org/web/2026/https://ateliers-demonaco.com/atelier/origins/)
- [Journal de Monaco n°7902 (6 March 2009) - Les Ateliers de Monaco S.A.M., constitution](https://journaldemonaco.gouv.mc/Journaux/2009/Journal-7902/LES-ATELIERS-DE-MONACO-S.A.M.-.-Societe-Anonyme-Monegasque-Etude-de-Me-Nathalie-AUREGLIA-CARUSO-Notaire-4-boulevard-des-Moulins-Monte-Carlo)
- [Journal de Monaco n°8184 (1 August 2014) - Les Ateliers de Monaco, early dissolution and liquidation](https://journaldemonaco.gouv.mc/Journaux/2014/Journal-8184/DISSOLUTION-ANTICIPEE-MISE-EN-LIQUIDATION-LES-ATELIERS-DE-MONACO-Societe-Anonyme-Monegasque-au-capital-de-250.000-euros-Siege-social-1-avenue-Henry-Dunant-Monaco)
- [Zefix - Les Ateliers Demonaco Sàrl (CHE-237.592.116)](https://www.zefix.ch/en/search/entity/list/firm/1178275)
- [Monochrome - Interview with Pim Koeslag, CEO of Ateliers deMonaco](https://monochrome-watches.com/interview-pim-koeslag-ceo-of-ateliers-demonaco-watches-geneva-seal/)
- [Wikipedia - Ateliers deMonaco](https://en.wikipedia.org/wiki/Ateliers_deMonaco)
- [Geneva commercial register extract - Les Ateliers Demonaco Sàrl](http://app2.ge.ch/ecohrcinternet/extract?lang=FR&companyOfsUid=CHE-237.592.116)
- [Fratello - Ateliers deMonaco, An Excellent Coverage By The Watch Lounge (April 2009)](https://www.fratellowatches.com/ateliers-demonaco-an-excellent-coverage-by-the-watch-lounge/)
- [FH (Federation of the Swiss Watch Industry) - Acquisition by the Citizen group (9 June 2016)](https://www.fhs.swiss/eng/2016_06_09_02_F_Constant.html)
- [Europa Star - Ateliers deMonaco brand index](https://www.europastar.com/brand-index/1004086002-ateliers-demonaco.html)
- [ateliers-demonaco.com (HTTP 503 'Website under maintenance', checked 19 Oct 2026)](https://ateliers-demonaco.com/)
- [Wayback CDX - ateliers-demonaco.com captures 2024-2026](https://web.archive.org/cdx/search/cdx?url=ateliers-demonaco.com&from=2024)

## Links

- [All Ateliers de Monaco watches](https://www.watchanchor.com/brand/ateliers-de-monaco)
- [Watch Anchor catalogue](https://www.watchanchor.com/browse)
- [llms.txt](https://www.watchanchor.com/llms.txt)