<https://www.usmilitariaforum.com/forums/index.php?/forum/1668-m-1-m-1c-m-2-helmets/>
<http://schema.org/name>
"M-1; M-1C &amp; M-2 HELMETS"
<https://www.usmilitariaforum.com/forums/index.php?/topic/372268-should-i-restore-this-m1-helmet-shell-or-should-i-keep-it-the-same/#comment-2937191>