Quartetto Cetra was created in 1941.
Cetra Records was created in 1933.
La Cetra - Vivaldi - was created in 1727.
Quartetto Egie was created in 1940.
Quartetto Italiano was created in 1945.
Quartetto Gelato was created in 1994.
Quartetto di Cremona was created in 2000.
Cetra Records ended in 1957.
Quartetto Italiano ended in 1980.
etc
The cast of Ciao Italia - 1965 includes: Mariarosa as Singer Quartetto Cetra as Singers Gigliola Cinquetti as Singer Johnny Dorelli as Singer Nico Fidenco as himself Jimmy Fontana as Singer Wilma Goich as Singer Rocco Granata as Singer Cantori Moderni as Choir Edoardo Vianello as Singer
You spell it: Et cetera :)
Il quartetto Basileus - 1983 is rated/received certificates of: Portugal:M/16