This is off a bridle or possibly some other element of horse furniture. Baluchistan Police were from the southern frontier with Afghanistan and may well have been a paramilitary organisation rather than a local police unit at that time, as I rather doubt that local police would have had such exotic horse furniture!

This could be a French, Dutch or even a US Union bridle boss and one would have been riveted on each side of the bridle. It is a die-struck brass badge (2.7cm top to bottom) and its condition is clean with remarkably little wear.