u/BassmanOz

Hi all,
My dad passed away a few years ago. He was a bit of a coin collector and I knew he had his collection stashed away somewhere but hadn’t seen it in years. Anyway my mum passed a few weeks ago and we found the collection in the bottom of a cupboard. This is one of the strangest coins he had. I think it may be a British sixpence that was only stamped on one face? Can anyone confirm? It’s about the same size as an Australian five cent coin.