Old Siam, Sir

"Old Siam, Sir"
Song
B-side	"Spin It On"

"Old Siam, Sir" is a hard rock single from Wings' 1979 album, Back to the Egg. It was the A-side of the UK version of the single--reaching No. 35--and the B-side was another album track, "Spin it On". "Old Siam, Sir" was also the B-side of the US single "Arrow Through Me".

Linda McCartney initially developed the main riff that evolved into this song. Paul McCartney then further the expanded that basic riff—along with guitarist Denny Laine—into a full song, recording an instrumental demo for it called "Super Big Heatwave". The unsubstantiated rumour that Linda played drums on this track is false; the drumming was handled by then-regular Wings' drummer Steve Holley.