Thanks for the input. I emailed this to Jerry and he indicated that the DZ stamp looks legit. Since my car has an 04B build code and the VIN is 9L529276, it could possibly be that the factory tried to re-stamp over an error. Also, it is very hard to be sure exactly what the numbers are under the larger font. The numbers I indicated were suggested by the previous owner (probably best guess). Besides that, as you can see there is an extra digit. There is still the question of the missing 9 between the '1' and the 'L'