Blue marker on ESB helmet

ok guys I've been browsing some of the reference pics for the last few slides I need to finish my ESB helmet and I noticed something that I haven't put onto mine. On the ESB helmet that made the tours there is a blue line looks like it's from a magic marker on the bottom right of the helmet. If this something that happened on the tour or something that was on the helmet in the movies. I can't find a clear enough picture of that spot to know if it's screen accurate or not. I haven't seen any other ESB helmets from members here who have that mark on it so I'm inclined to think it was done during the tour at some point. Just trying to figure out wether to put it on my bucket or not.

http://www.thedentedhelmet.com/galle...g2_itemId=6755

eeek no don't do that

No blue marker on the screen used.

I wouldn't.