Shown below are a Thorneycroft's Mounted Infantry slouch hat and shoulder title pair, to which I have added a variation of the shoulder title, perhaps a later manufacture and of poorer quality. The TMI pair and the BMI pair I showed on Roy's earlier Bethune's Mounted Infantry Badge post were probably from the same manufacturer and of the same vintage, i.e. made when the two regiments were raised in Natal.
Brett and Roy
A favourite Regiment of mine! My TMI is similar to Brett's lower example; save that it appears to have been made with more care (picking my words carefully here, Brett!). Illustrated in the Droogleever book, "Thorneycroft's Unbuttoned" is a very crude, cast brass TMI title. Tomorrow, I will post pics of my TMI title to show what I mean about it's finish.
Thank you for the pic of your badge. It is definitely different from my No. 3, and of much better quality, so it is another to search for.
While going through my small badge collection I was taken again by those of the Imperial Light Horse, my favourite regiment. Since you are new on this site, you may not have seen the earlier thread on ILH badges (see link below). On page 6 of the ILH badge thread there is a pic of a battlefield pick-up. Badge collecting does not get any better than that!