I recently purchased a R7 XR from a co-worker of mine. I'm sure he is not intentionally trying to pull one over on me but he is, nevertheless, clueless about this club-He picked it up in his travels. I am worried because there is no serial number on the hosel. I have heard many reasons for this from it was from the "tour van" to this Japan made model does not have a serial number imprinted on the club. The shaft is a REAX Plus which I know is aimed at the Asian market. Any comments or suggestions would be helpful. Thanks.