That is dedication for pinball
Is it a holly grail pin ?
Passion for pinball ... 
It's probably my favourite game. Some don't rate it except for the art but I love it. My existing glass isn't terrible but it does have a 20c piece of the art missing and some early lifting on the bottom right hand side. From the other pics I have of the glass this one is really nice. The game will never leave my collection so it's worth the effort.
