This section contains some significant dates and events related to the progress of the study.
2020
19 October 2020: buying of the mechanism and beginning of the study
28 October 2020: communication of the Brateau files on Le Noir family by the Musée des Arts et Métiers
October to December 2020: consulting of the first general books on the history of horology and early pendulum clocks: Sully, Alexandre and Thiout treatises, Plomp books, Huygens' legacy, A Royal 'Haagse Klok', etc.
November 2020: mechanism dismantled and carefully examined
23 December 2020: beginning of the writing of the memorandum
2021
March 2021: cleaning of the gilding
13 March 2021: consulting of the wedding contract at the National Archives
April 2021: first contact with the LGPM laboratory of CentraleSupélec to discuss the possibility to perform spectroscopic (EDS) analyses
11 June 2021: consulting of the Brateau files and Raillard treatise in the Musée des Arts et Métiers
June 2020: making of a pendulum and a fork to prepare the first functional tests of the mechanism
25 August 2021: first EDS analyses at the LGPM
30 November 2021: follow-up of EDS analyses
December 2021: AFAHA contacted to anticipate the publishing of the first article of June 2022
2022
January 2022: discovery of the auction catalogue of Leroux's collection
15 January 2022: consultation of the catalogue from the 1880 exhibition of the Union Centrale des Arts Décoratifs
2 February 2022: creation of the website to share information about the studie
7 March 2022: follow-up of EDS analyses
9 April 2022: consultation of the minutes from the 1896 sale of Leroux's collection at the archives of the city of Paris
23 April 2022: consultation of the inventory of Jean-Léonce Leroux's goods at the National Archives
May 2022: first intermediate version of the memorandum published on the website
June 2022: first article published in the journal Horlogerie Ancienne
22 August 2022: consultation of Pierre des Noyers' handwritten letters at the archives of the Ministry of Foreign Affairs
September 2022: video from CentraleSupélec published on LinkedIn about the study and the first results of the spectroscopic analyses
9 October 2022: follow-up of EDS analyses
9 October 2022: first tomographic analyses at the LMPS laboratory of the ENS Paris-Saclay
4 December 2022: first lecture delivered at the regional meeting of the AFAHA
21 December 2022: consultation of the archives of the Union Centrale des Arts Décoratifs
2023
27 & 28 February 2023: complete tomography of the mechanism at Zeiss laboratories
June 2023: second article published in the journal Horlogerie Ancienne, note published in the journal Antiquarian Horology
21 July 2023: last EDS analyses
25 July 2023: first XRF analyses with the CRC
22 & 29 August 2023: complementary XRF analyses at the Néel Institute
16 October 2023: analyses of CHARM samples to calibrate the spectrometer of the Néel Institute
3 December 2023: second lecture delivered at the regional meeting of the AFAHA
December 2023: analyses of the CHARM samples to calibrate the spectrometer of the CRC
2024
March 2024: third article published in the journal Antiquarian Horology
22 March 2024: PIXE analyses at the C2RMF