FrasMaj2000

Hi all, this is my first post so apologies if there is a more relevant topic area! my grandmother has unfortunately passed away, and I have been looking through some interesting old coin collections that I had found in a drawer - then this popped up (pictures attached). I didn’t think much of it at first as I am inexperienced with coin collecting, however after a bit of research, I realised that this one may be quite interesting! At the moment I’m assuming that she had an old Victorian half-sovereign lying around? Although, I would be more than happy for someone to correct me. Thanks!