Poster for the Blue Network radio program <i>The Sea Hound</i>, produced in association with the Office of the Coordinator of Inter-American Affairs
<ul><li>" … reissued with changes in 1943"</li></ul>
Captain Silver Syndicate, Inc.; art bears the signature "NEFF"
<a rel="nofollow" class="external text" href="https://www.raremaps.com/gallery/detail/46016/Captain_Silvers_Sea_Chart/Neff.html">Source</a>