Anna (Neta) and Domenica (Kina) Costamagna were born in 1911 in Trinità, province of Cuneo, Italy.
In the 1940s they began, as autodidacts, to study music: Neta with the guitar and China with the mandolin.
Kina died in 1990, but Neta continued to sing solo, or with other popular groups.
In 2001, for the 90th birthday of China an artistic book about their work was published, with compliments by Renzo Arbore, Aldo Grasso, Michele Serra and many others.
[2] From the summer of 2011, the Municipality of Trinità has organised, every 2–3 years, the Nete Pride,[3] in collaboration with popular Italian groups.