Royal Scots Greys

[billy]

Hi all, here is either an Arm badge? or a Pouch badge, but on the rear is a partial mark and hopefully someone may recognise it?? Badge itself isn't Hallmarked but appears Silver ( blackens white paper when rubbed onto it?? ) any information on it would be appreciated, date in use or could it beca Pipers badge?

That is if its real of course? Many thanks in advance Billy