https://www.jstor.org/stable/4422958...n_tab_contents
Page 225 of this article does not show a picture but states that the advent of the Brodrick saw new badges required for 9 regiments. This list includes the 19th Hussars 4659a/1903 badge which is described as 'smaller'.
As the article itself suggests the all white 19th Hussars New Pattern 'Brodrick' (colour changed to drummer red cloth in 1904) may not have been actually worn by the cavalry until as late as 1906 and even then not for very long before the peaked cap was adopted in late 1906.