Image: postcard attributed to several dates, including 1939.
“For years [Everett Adargo] thrilled the tourists always bringing them an abalone shell or some form of submarine life at the conclusion of the dive. At one time, he held the world’s underwater record of three minutes, fifteen seconds. This was with no swimming aids whatsoever. World War II terminated his job…”
Excerpt and more information at https://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=162438489 .