I know the quality of the image is very bad, but I could not find it in a better quality. I have seen this font on an old poster announcing a concert (70s)
Can anyone identify this font? I will be very grateful!

No idea?

It looks hand-drawn to me. If you look closely to the matching letters, you see a slight difference. From what you can determine in that small image

An alternative could be this one: https://fonts.adobe.com/fonts/cc-biff-bam-boom