INA
Here is an antique revolver INA who was made here past times.
That factory was closed in 1964.
INA (Industria Brasileira de Armas ) existed in São Paulo city , and made others firearms, like pistols and little 357 revolver.
The principal product was a submachine gun, copy of Madsen, but in .45 calibre, used by Brazilian army.
And was used for Brazilian police not so long time ago, and many was change for 9 mm too.
Today is thing of collection.
Will to see if localize one for photos.
A Brazilian collector