Fender frankenbass - Japanese body/Mexican neck

I have a bass that I was told has a MIJ body and pickups and a MIM neck. The neck is definitely MIM as the serial number is MN4129343, which makes the build year 1994-1995 according to the Fender website. Is there a serial number somewhere on the body (in the cavity perhaps? ) that would identify when and where the body was made? red jazz bass #1.jpg red jazz bass #2.jpg red jazz bass #3.jpg
 
With the photos you provided the body could be a lot of things. Could you take a photo of the body facing the camera rather than at an angle?

One thing you might look for is that some Japanese Fender bodies have a stamped code in the neck pocket...something like "JB-123". I've not seen a Japanese body with a serial number on it but it's not impossible.

A lot of MIM bodies have an indexing hole under the pickguard that's around 1/2" to under 3/4" in diameter. A lot of people call that the "stash hole". If the body is MIM it should also have a date stamp in the neck pocket.