Terminology

[David Webb]

I am trying to locate parts for my 1999 Jaguar XJ8 3.2 Saloon on E-Bay, and, after entering the year, in the search field, I am asked to specify the variant, and presented with the following options:

Any Variant,

NAW, NBW (1997-2003) Saloon

NAW_NBW_(1997-2003) Saloon

X308 (1997-2003) Saloon

As I have no idea what the acronyms NAW, and NBW, represent, or whether my car is an X308, I don't know which variant I should select. 

Can anyone enlighten me?

Thanks,

David Webb