Clint Eastwood Pocket Watch Music

what is the music on a gold pocket watch in a Clint Eastwood western. They draw when the music stops?

I think the film is either The Good the Bad and the Ugly , Fistful of Dollars or a Few Dollars More

It is called “THE MUSICAL POCKET WATCH” Playing Time: 1:10
Written by Ennio Morricone , as other thought, although from “A Few Dollars More”. It plays from Indio’s (Gian Maria Volonte) pocket watch each time he challenges someone to a shoot out.

You can listen to it here:

http://www.clinteastwood.net/welcome2.html

For a Few Dollars More ( FILMING LOCATION VIDEO) Eastwood Sergio Leone Ennio Morricone theme song