It's an unfinished RAD member badge.
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Could you perhaps post a rear view? Your badge looks more rounded than what I am accustomed to.
I have only ever seen this as cap badges
Attachment 406109 i will post a pic of the back of it now thanks
IMO the one you show is a fake / copy, sorry. Quality expected is just not there.
is it real or a copy ?
As Tom says above - sadly, it is a copy.........
I think any TR stick pin without a knurled pin should be viewed suspiciously.
Looking for LDO marked EK2s and items relating to U-406.....