The 1957 7-1 match is referred to here
Celtic Forum 7 Oct 2008  but not quoted in full. " ...There is a lot more verses to the song but I get them mixed up a bit now after over 50 years . ..."

But this seems more confident

A yankee came to Hampden Park a football match to see
Attracted by the magic of the Old Firm rivalry
Well, little did he know just what a treat he had in store
When watching Glasgow Celtic adding to the score

Chorus
Piling on the agony
Puting on the style
And 1, 2, 3, 4, 5, 6, 7 scoring all the while
He'd never seen such football
He travelled many a mile
As watching Glasgow Celtic puting on the style

Whens the game about to start, oh when does it begin
Oh why have they not started, oh why they shooting in
Oh the game is well in progress Sir, he answered with a smile
Your watching Glasgow Celtic puting on the style
Chorus

Hampden Park was crowded the fans began to roar
The Rangers fans were singing, with the scarves their fathers wore
But very soon they changed their tune, History it was set
When Willie Fernie got the ball and he stuck it in the net
Chorus

Whos that boy out on the wing, the one in Green and White
The boys in Blue cant catch him, though they try with all their might
That nimble sone of Éireann, with all the football guile
It's Charles Patrick Tully puting on the style
Chorus

Now the famous Celtic supporters, all want to go to heaven
To celebrate that League Cup win of 1957
That day will be remembered, for a game so nobley won
When Celtic met the Rangers and beat them 7-1
Chorus

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