Just picked up a used MIM standard Tele and noticed the sticker in the pickup cavity doesn't match the serial number on the headstock. Headstock serial is MZ4XXXXXX and body sticker number is M00XXXXXX. I realize necks and bodies can be produced at different times, but wondered whether this indicates a parts swap in the guitar's past. Or is the body sticker number some other type of parts code? Not a big deal, just wondering.