Here's the blurb (taken from a cassette recording that the Eagle Society produced some years back), itself from the advert in Eagle...
And here's what the centre of the record 'looked' like
Knowing that this existed I was rather surprised to spot these images on ebay the other day of a gramophone record that sounds identical, except that it's published in association with Picture Post (Hulton Press published both Picture Post and Eagle). Both records are produced by Oriole but have different reference numbers (the Picture Post reference is MG20003, whereas the Eagle advert references gramophone record CB1140). Both reference numbers are clearly visible on the records.
So there you have it - a glimpse into some obscure 1950s comics merchandise, plus the only chance you'll get to hear legendary editor Marcus Morris speak.