Greetings Alex.
Not sure what you have here.
From the front it appears to be a proper first pattern ORs badge, however, the rear is most certainly not.
I suspect, but I may well be wrong, that a proper badge has had a plate of whichever metal it is, cut to fit exactly and the badge has then been put into use for another purpose.
Possibly a Sweetheart item, however the fixings appear wrong.
Are they lugs or the type that would support a pin?
Whatever it was made for, I very much doubt it would have been used a cap badge after it had been adapted.
Regards.
Brian