Is there anything on the back of the headstock?
A "second" can mean a guitar that has some sort of minor cosmetic defect that kept it from being sold as regular run guitar. May have a "2" or something similar stamped on the back of the headstock.
Or, it may not be that at all.
Pix of the pickup cavities?
In any event, the mods have killed the collector value. Get it for the right price, sell off the T & B pickups, and set that bad boy up just how you like it. It'll make an awesome player.