Jean Schwarzentrub
Timeline
- Before 1883 - Peter Obrecht establishes P. Obrecht-Schild in Grenchen
- 1883 - January 1 - P. Obrecht & Cie. is established by Edouard Kummer, "Johann Schwarzentrub", and Peter Obrecht
- 1886 - April 23 - Hulda Grünberg (née Hennig) establishes H. Grünberg in Bienne
- 1889 - February 3 - Obrecht-Hugi takes over P. Obrecht-Schild
- 1892 - Jean Schwarzentrub resigns from P. Obrecht & Cie of Grenchen
- 1893 - May 1 - Hulda Grünberg reorganizes her company with Gabriel Bernheim and Leon Pistner as limited partners and her husband Adolf Grünberg as manager
- 1893 - August 1 - Jean Schwarzentrub and Arthur Müller form Schwarzentrub & Müller in Grenchen
- 1893 - December 26 - Schwarzentrub & Müller is dissolved with the operation taken up by Jean Schwarzentrub alone
- 1896 - February 17 - Hula Grünberg and Jean Schwarzentrub partner as Schwarzentrub & H. Grünberg with her husband Adolf Grünberg as manager
- 1896 - September 12 - Schwarzentrub & H. Grünberg is dissolved
- 1897 - March 25 - Hulda Grünberg and her husband Adolf Grünberg reiterate their control over the firm H. Grünberg
- 1897 - July 6 - Friedli, Triebold & Cie is established as a maker and finisher of ebauches and escapements; Louis Friedli and Jean Schwarzentrub are managers
- 1898 - December - Jean Schwarzentrub is bankrupt and his namesake company is deleted
- 1899 - January 30 - Friedli, Triebold & Cie is closed by the owners
- 1899 - February 20 - A new firm called Friedli, Triebold & Cie is established by Louis Friedli, August Triebold, and Johann Michel to manufacture ebauches
- 1899 - August 1 - Ernest Baumgartner, Arnold Baumgartner, and Johann Michel form Baumgartner & Michel and take over the assets and business of Friedli, Triebold & Cie
- 1901 - September 1 - Schwarzentrub and Adolf Michel establish Ad. Michel & Cie, Ebauches-Fabrik in Lengnau
- 1903 - June 26 - Ad. Michel & Cie, Ebauches-Fabrik is moved to Grenchen
- 1904 - February 9 - Ad. Michel & Cie is taken over by a new firm, Obrecht-Hugi & Cie, in Grenchen, with Emil Obrecht-Hugi and Jean Schwarzentrub as directors; the firm is located at Mitteldorfstrasse 36
- 1932 - September 17 - The firm of Obrecht-Hugi is deleted following the death of Emil Obrecht-Hugi