http://www.guitardaterproject.org/epiphone.aspx

Just found this site which can give you some production info on you guitar.

My Epi Les Paul came back with this info...

Your guitar was made at the
Fuji-gen Plant, Japan
2003
Production Number: 01606


I thought this was pretty cool! Listed below are the brands you can search on.

*Pot Code Reader*
Epiphone
Fender
Gibson
Ibanez
Yamaha


Cheers!