1939 Press Photo Lifebelt Expands Once Button Pushed Brings Bather to Surface

A new lifebelt, employing a chemical that expands when a button is pushed, is designed to save bathers in dangers of drowning. In the photo a swimmer has gone down for the 2nd time, but still is able to press the button on the belt.

Photo is dated 1939.

Photo measures 8 x 6.25 inches.