I found this at home and it's engraved with "THE BORDER REGIMENT." I looked it up and it seems to be related to the European Border Regiment, but the details are unknown. [Product Details] Product Name: Metal Button Color: Blackish Silver Material: Metal, but details are unknown Size: Approximately 15mm in diameter Quantity: 1 [Condition] Stored at home. There are slight scratches and discoloration on the back due to aging, but otherwise, there is no noticeable damage. [Shipping Method] - Yu-packet Post Mini [Notes] - Please be sure to read the profile section. Please understand the above points. This is a long-term storage item, so please refrain from purchasing if you are concerned about the fine details. If you have any questions, please be sure to ask before purchasing. [Search Keywords] Button Metal button Military School Europe Vintage