Her Royal Highness was the first person to win the honor.
"Well it was of course, all done in the Bath Club in the swimming pool, and I suppose I didn't really actually realize quite what I was doing," the queen admitted. "I think I must have been 12 or 14 or something. It was a very long time ago, I'm afraid."
NEW: The Queen has spoken in public for the first time since the death of Prince Philip as she recalled her lifesaving badge from 80 years ago. The Queen was talking to the @RLSSUK - of which she remains Patron. She was the first holder of the Junior Respiration Award. pic.twitter.com/Yn1B9DpNlq
When a volunteer informed her that it was actually 80 years ago, Her Majesty let out a giggle and declared, "That's terrible! I didn't realize I was the first one, I just did it. I had to work very hard for it. But it was a great achievement and I was very proud to wear the badge on the front of my swimming suit."
The event marked the first time Queen Elizabeth has spoken publicly since Prince Philip's funeral last month.
For more from the somber occasion, watch the clip below.