Not necessary. The serial is obviously off as mentioned in post #10, not to mention the other things wrong with it visually.
lol...simple way to tell this racket is fake... the serial code is ON the side with the "cs cap" on a real at-800 its on the opposite side, where they have the "x section:box" logo =)
Is that a PBSI sticker in the first picture? I have yet seen any Japanese coded racket with PBSI sticker on the cone. I think it is a FAKE unless someone can enlighten me about this matter.
http://www.ece.ubc.ca/~nsiu/sandbox/BFSerial/jpgraph/code/YonexSerialEntry.html Look how far off the curve this racket's S/N's are!
I am curious about this though. How well does it play? If it plays really well for you does it matter?