JB-62 is a legitimate Fender Japan model number, usually followed by two or three more numbers to indicate where in the range the model sits (there are a few different levels of '62 Jazz Bass reissues, with different pickups, body woods and hardware). Most bodies on these are basswood, but there are some exceptions made of alder. Basswood is a little less dense and a bit softer, and therefore more prone to dinging. Could explain the damage around the body edges.