There's a nice page on Caloi 10 road bikes and variants. The 10 was Brazil's first 10-speed bike and production started in 1972. The page is in Portuguese but perhaps your browser can translate:
https://www.devoltaparaovinil.com.br/2013/03/bicicletas-caloi-10.html?m=1
https://www.devoltaparaovinil.com.br/2013/03/bicicletas-caloi-10.html?m=1
