Here's a site that gives some info. I am no expert. A couple of things about your pickup makes me give pause 1)The decal shows no yellowing of the border of the decal. 2)The "L' brackets seem to 'clean'.
As the info in the link below notes, there are many other things that need to be considered....and some of them are under that cover. That "#1 Wound by " sticker is odd.....and not Gibson, I would think. Your pics don't show good straight on shots of areas of interest. Notice how the pics are taken in the linked site. They show details that one has to see to determine things.
The fellows over on the Les Paul forum would know in a heartbeat....I may link this thread to them. STudy the link info...it is of interest.
http://www.provide.net/~cfh/paf.html
