Mimí Derba was a pioneering force in the Mexican film industry, celebrated for her dual roles as an actress and the first female director in Mexico. Her landmark film, *Rosauro Castro* (1950), not only showcased her talent in front of the camera but also marked a significant moment in Mexican cinema history, representing the struggles and triumphs of women in the industry. Collectors highly seek out this film due to its cultural significance and the rarity of Derba's work, making it a prized possession for those passionate about Latin American cinema. In addition to *Rosauro Castro*, Derba's legacy extends beyond her on-screen performances; she founded Azteca Films, one of the earliest Mexican production companies, where she forged a path for future generations of filmmakers. Collectors appreciate her contributions not only for their artistic value but for their historical importance, often searching for rare releases that depict the evolution of film during a transformative era in Mexico. Derba's films are essential for any serious collector looking to understand the roots of Mexican cinema.