Jimi Hendrix Poster 1-15-69 Experience In Germany

This is I believe is an original Jimi Henrix poster. I don't think it is the concert poster . It has lots of wear and age on it but still is in OK shape. On the very bottom right it has in very small print  "Printed in England". I have not seen that on any reproductions. See all the pictures but will try and describe what I see and the problem areas. The colors still are realy good. On the top it has his name and at the bottom it has the date 15.1.69, Mitwoch 20 Uhr Beethovensaal Stuttgart and Experience. It has one tear 1 /3/4 " at the very top, has some type of yellow crayon stuff on the back and it is an oil base that is slightly coming through the poster (about 4 small areas) and seems to be at each corner, so it may be some type of stuff to hang it. Then there are these brown slightly rough round dots over the top of the poster ( mainly the front). This goes from the top down  about 5- 6" and then few spots at the very bottom and the back. It is not mold but possible could be from smoking ?? I don't know, have you ever heard of that before?

I bought this from an older gentleman. He said it was given to him in the mid 70's and had it ever since. That is all I know about it. Was wondering if it is worth anything with the condition it is in.

Thanks for any help you can give me.