This is cool. Early version of Saint & Sinner from the Creatures sessions featuring Vinnie on guitar, where the band are clearly working up the structure of the song.

What's interesting is the banter at the start before they start playing - sounds like Gene is ribbing Vinnie's accent. It seems very good natured.

Gene is scatting the lyrics at this point and kinda sings the guitar solo.

Side note - this remains my favourite all time Kiss track!