Looks to me like you have a factory defect - send it to me and I'll grudgingly take it off your hands...
Seriously, it looks stunning! And yes, it's perfectly natural for any bass that's being played - and not kept in a hermetically sealed case - to have a glorious aged look.
LOG #406, Lakland 01 Owners #63, Hollowbody Bass #344, Thunderbird #152,
MM S.U.B. #1, Roger Waters Bass #3, Crappy Bassist with Expensive Gear #212