Duke of Cornwall’s Light Infantry Cap Badge - genuine or not?

['Ticker' Riley]

I wonder if anyone can help with authenticating, or otherwise, this Duke of Cornwall’s Light Infantry badge for me. According to the Makers Marks’ page on the Forum, it seems to bear the infamous 15mm J.R.GAUNT.LONDON stamp that is apparently associated with 1970s restrikes:

As I am not a badge collector as such I am rather at the mercy of my own ignorance I’m afraid, and so desperately need the expert opinion of Forum members before I decide to keep or return the badge to the seller. I have already informed him that this may well be a restrike, but am unable to say for certain myself so would really appreciate any advice members could give. There does seem to be some wear on the badge that makes it look more genuine, at least to my untrained eye, and the seller believes it to be an original as he understood the writing on fake Gaunt badges to be larger than in this example:

Any help or comments would be gratefully received – thank you.

Regards

Martin