I attach photos of a badge dug up in the 1970s which I believe might have belonged to a soldier of the 52nd having been found in that part of the battlefield over which that regiment fought . Is anyone able to assist ?
I'd also be inclined to say that was a collar badge.
I think what you might have is a possibly WW1 onwards era Ox & Bucks collar badge, as shown here:
The use of cord rather than ribbon, and then not knotted but merely looped is quite distinctive. They were of course successors to the 52nd
The 52nd's Victorian era Glengarry badge has the number but also uses knotted ribbon rather than cords.
The contemporary and subsequent uniform illustrations are not distinctive enough to tell if they are trying to represent ribbons or cords. They all though appear larger and less compact than your badge though.
The size of your badge would be a good indicator, can you give an overall size?
My current money is on a collar badge (which was worn up until 1958) lost at a commemoration?
It’s fairly generic light infantry. The one on display in the museum attached to a shako seems a little larger and slightly different design. Could it be a pouch ornament? It could even be from a re-enactor