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In page Callot Soeurs:
"In 1928, Pierre Gerber, Marie Callot Gerber's son, took over the business but could not survive in the highly competitive market and, in 1937, the House of Callot Soeurs closed and was absorbed into the House of Calvet (Marie-Louise Calvet);[2] under the Callot label. However, World War II made matters difficult in France. Similarly to what happened with the House of Vionnet in 1939, Calvet and the Callot label finally closed in 1952.
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