This unmailed 4″ x 7-1/8″ card is just like so many others we have listed under “Argentina,” and the card was made in Argentina (Grafica, No. 1607), but the caption is in Portuguese and clearly says “Brasil”.  Yes, we know the falls span both countries.  Just wanted to point out what the card says — also that it is postally unmailed, but with a 1973 message on the reverse.  Grade: 4