Thank you for viewing. This is a silver-plated tack pin. It has an opal decoration. It's an old item, but it was carefully stored in a jewelry box, so there is no noticeable deterioration. The back is stamped "SILVER PLATED". This item is from my grandfather's belongings, which he was sorting through before he passed away. My grandfather had started to suffer from dementia, so I don't know the details, but he was an executive at a large company, so I believe it's from when he was still working. As a woman, I don't know how much it's worth, but I hope to sell it to someone who collects these items or appreciates them. - Material: Silver - Decoration: Opal - Stamp: SILVER PLATED #SilverPlated #SILVER #TackPin #TiePin #SilverPlated #Opal #ShowaRetro