Los Angeles sportswriter Bob Hunter modeling a new baseball helmet in 1939. The helmet's design is similar to earmuffs and fits over the baseball cap.
Unknown author<span style="display: none;">Unknown author</span>
<a rel="nofollow" class="external text" href="https://newspapers.lib.utah.edu/details?id=148735&amp;facet_paper="><i>Bingham Bulletin</i></a>