Hi... Can anyone help me out on this font, I'm pretty sure it's helvetica but I'm not sure which weight/version

Thanks!

Neue Helvetica Black  Suggested by Deleted user 452473 


Swiss 721 Heavy  Suggested by fridelain 

Or Europa Grotesk Demi Bold, or Nimbus Sans Novus Heavy. They look the same.

http://28.media.tumblr.com/tumblr_llxrlhDnQZ1qkybioo1_400.jpg

Anyway, it might be found in the book called "Helvetica: Homage to a Typeface", so i guess it's Helvetica
http://www.experimentaljetset.nl/archive/john-paul-ringo-george.html

in my opinion this is Neue Helvetica Black.
Neue Helvetica came out in the 80s. So i think the original shirts were printed with the original Helvetica.