Actually, according to the
sound file page on this site, the basic "pocket watch music" on the soundtrack is just called "The Musical Pocket Watch." "Sixty Seconds to What" is another track that uses the tune, but in an orchestrated version; it's "the music from the final showdown between Colonel Mortimer (Lee Van Cleef) and Indio (Gian Maria Volonte)."
The soundtrack is available from Amazon for less than $10; why not just buy it and support the artists who produced it?
