Hmmmmm I'm not sure then, unfortunately I'm not an expert on Frogskins lol. Maybe ask around and see what others think about the frame. I personally never purchased from that seller before so I can't confirm or deny his legitimacy. I see though, he does have a very good feedback rating. Sorry I couldn't have been more of a help!!!Thought that too but I also read on there that the later Frogs and MPH ones do not have serials on the stems anymore?