Ok.
In The Portland Collection, it's in D, as follows (chords marked per half bar).
1st part :
D D D D D D A D
D D D D D D A D
A A D D G A D D
A A D7 D7 G A D D
2nd part :
|: F F F Dm F F F Dm :|
3rd part :
Bb Bb Bb Bb C#dim C#dim C#dim C#dim
A A A A A A A A

On the Penguin Cafe Orchestra's original, as transcribed by me from their record whose name I can't remember, it's in C, as follows.
|:
C C C C C C G C
C C C C C C G C
G G C C F G C C
G G C C F G C C
:| 3 times
|: Eb Eb Eb Eb :|
Ab Ab Ab Ab Abm Abm Abm Abm
Bdim Bdim Bdim Bdim Bdim Bdim Bdim Bdim
C C C C C C G C
C C C C C C G C
G G C C F F C C
G G C C F F C C
|: Eb Eb Eb Eb :|
Ab Ab Ab Ab Abm Abm Abm Abm
Bdim Bdim Bdim Bdim Bdim Bdim Bdim Bdim
|: C C C C C C G C
C C C C C C G C
G G C C F G C C
G G C C F G C C :|
G G C C F G C C
G G C C F G C C


And yes, my memory failed me again, its just ordinary diminished, not dim7th.