Muhammed Ali advert for an SOS chain

I may have asked this before years ago but does anyone remember Ali in a TV advert maybe late 70s early 80s advertising some kind of chain to wear round your neck that you could put all your details in case of an accident or sudden amnesia etc??

I'm certain it was called an SOS chain. Google returns nothing but I definitely remember this even a lad in class who had one at the time which would make it 79/80.

Please someone else say they remember or I could indeed be entering the arena of the confused middle aged gentlemen....

Ali did do a lot of endorsements at the end of his career so it could be possible. A friend of mine saw him publicise a car lot in Birmingham UK.

It happened goddammit

Saw this...hey it's close ;D https://youtu.be/1T-hnphtTsg

This came out the same year. Oddly that end line "I've fallen and can't get up" was a major punchline over here years afterwards :-X;D
https://youtu.be/bQlpDiXPZHQ

man that's sad to see - can't be long after his diagnosis

I will find this SOS chain !!!