Ebauches SA quickly expanded, adding Hora SA of Cortébert, Sonceboz, Charles Hahn & Cie, and Landeron, among other smaller makers in 1927. The next year, Ebauches SA added 10 more companies, including Felsa SA, Venus SA, Bovet, and Optima. 1929 saw 8 more, including Postala and Urania. Also added were Guerrin-Bourquin & Cie and Unitas SA, the movement maker of A. Reymond.