js6 joe satriani

I just received a JS6 however although the headstock looks to be correct it does NOT have the "JS Series" Logo below Ibanez. When I measure the nut width I come up with 1 5/8" not even close to 1 11/16". The SN is: J 001303 and was listed as a 1992 JS6. The Hog body looks correct but I'm...