Omega SA
Betty Fiechter remained director of Blancpain until 1950, when her nephew, Jean-Jacques Fiechter, joined her. At the end of the 1950s, Rayville-Blancpain was producing more than 100,000 watches per year. To make it possible to meet the continually growing demand, the firm became part of the SSIH, joining such brands as Omega SA, Tissot and Lemania. In 1971, the company's annual production reached the historical peak of 220,000 watches. During the quartz crisis of the 1970s, SSIH was forced to reduce its output by half and to sell off part of its assets.