I have a Les Paul Custom which dates back to 1972.It is a 54' reissue with a P90 and an Alnico V pickup.It also has an LE prefix.Could anybody tell me how many of these guitars were made given that they were a Limited Edition.I have also heard rumours that the Alnico V pick up could in fact be left overs from the 1950's.Could anybody also tell me how to work out an approximate date or era for P90 or AlnicoV pickups.Sorry to throw all these questions to you at once, however I have just acquired this guitar and I'd like to find out as much information as I possibly can.