On 10th January, 1889, Irenée Aubry was awarded a patent for the Hebdomas, an inexpensive pocket watch with an 8-day movement. The Zenith El Primero was unveiled to the public on 10th January, 1969.
Ami LeCoultre was born on 10th January, 1602 in Geneva. Abraham Louise Breguet was born on 10th January, 1747 in Neuenburg. Charles Samuel Capt was born on 10th January, 1751 in Le Sentier. Pierre-Théodore Sauteur was born on 10th January, 1790 in Saint-Nicolas d'Aliermont. Félicité-Hortense Letellier was born on 10th January, 1814 in Saint-Aubin-le-Cauf near Saint-Nicolas d'Aliermont. Louise Peugeot was born on 10th January, 1827 in Beaucourt. Jules Huguenin (Dumittan) was born on 10th January, 1837 in Malvilliers. Victor-Abraham-Ulysse Fortin was born on 10th January, 1848 in Saint-Nicolas d'Aliermont. Pauline Eugénie Huguenin (Dezot) was born on 10th January, 1857 in La Chaux-du-Milieu. Suzanne-Albertine Roussel was born on 10th January, 1878 in Saint-Nicolas d'Aliermont.
Johann Cochläus died on 10th January, 1552 in Breslau. Pierre-Napoléon Hardy died on 10th January, 1866 in Saint-Nicolas d'Aliermont. Émédé-Victor Blondel died on 10th January, 1870 in Saint-Nicolas d'Aliermont. Georges-Julien Sénéchal died on 10th January, 1987 in Ile-Adam, Val-D'Oise. }}