Mystery Keyboard Sound

I am looking for a keyboard sound/effect that I have heard on a few tracks but can’t work out what it is.
It is almost like a sequencer but I thnk it was originally done on a Hammond.
It appears in the Talk Talk track ‘I Dont Believe in You’ in the intro and chorus
http://www.youtube.com/watch?v=UqCBnLO_jqk&feature=related

Also, Pink Floyd used it a couple of times,
for example, at the end of Another Brick in The Wall (Part 3)
http://www.youtube.com/watch?v=O_JEi0HP6xc

Any ideas?

bump

That would be Steve Winwood on the Talk Talk track, so it must be a Hammond.
(It is credited as “Steve Winwood - Organ” and notice how heroically I have avoided the obvious “Private Eye” style bad jokes) :laughing: