Physical Graffiti

[Stratmangler]

Has anyone out there got a first edition vinyl pressing of Led Zeppelin's album Physical Graffiti ?

I've spent much of the last few weeks archiving CD's to HD in flac format (yes I've got one of the dreaded Squeezboxes), and have just got around to doing this album.

At the end of track 3 "In My Time Of Dying", shortly after Bob Plant's vocal effectively ends, there is a pause, someone in the studio coughs, and Bob Plant picks up on it and sings the word cough. Then a small discussion starts.

My vinyl copy does not contain the above runout to the track.
I remember that it was on a pre-recorded cassette tape of the album.

I just wonder if it ever got onto vinyl at all.

Chris