Tono: F
Introducción:
Bb
after the intro there's a one measure rest then 2x 12 bar blues pattern,
inst. break, one more verse and outro.
E7(4) A7/2 E7/2 B7/2 E7/2
E7=1st 2 measyres of intro
A7=measures 5+6
Eb
3rd verse and fade.
as with any song listen to it for the rhythm. Let me know if it helped.