Pins

Today, I sat near a lady in the National Library foyer who offered these pins for the Library collection. She explained that her father had collected them from soldiers in the end-of-war celebrations. The curator was very pleased to accept the Australian ones, and asked what the owner would do with the others. The lady suggested they might be offered to the Australian War Memorial, an idea that seemed to please the questioner. They were happy to clear some space for Ms Nosey to take a photo. The Library ceiling lights were an added bonus. Does anyone know anything about any of these pins? Seen them before? Owned one?!