This info is on the side of the box:
Metalurgica e Municoes
amadeo Rossi & CIA
Fundade em 1869
Rua Epitanio Fogaca, 143 - Cx. Postal 28 - End. Teleg. "Rossi" - Sao Leopoldo - R. G. do Sul
Rossi Calibre: 22 L.R.
Para Balas Short - Long E Long - Rifle
Things I've gathered from writing and gun itself. It is a double action 22 l.r. 7 shot revolver
on the barrel is has this "amadeo rossi" on one side and on the other side it has "s. leopoldo r.g.s.22L.R.