Hello Tod, exactly. In 1947 was added a subtitle at the bottom os the clasp, ESTADOS UNIDOS DO BRASIL. This model last until 1954, when the name of the country changed to Republica Federativa do Brasil.
This wing you are talking about is a 1941 model too. I do not have the regulation, but I have a 1942 advertisement of the Brazilian Air Force to brazilian peolpe, explaining the brand new force and its clasps, uniforms, etc.
Soon I will start a thread about the 1941 and so on wings. I have almost all of them
Cheers.
Julio