A blank version of an American World War II dog tag.
<a href="//commons.wikimedia.org/wiki/User:Noha307" title="User:Noha307">Noha307</a>
CC BY-SA 4.0
Own work based on: <a href="//commons.wikimedia.org/wiki/File:J-1032_-_NARA_-_131497031_(page_12).jpg" title="File:J-1032 - NARA - 131497031 (page 12).jpg">File:J-1032 - NARA - 131497031 (page 12).jpg</a>