Is there a way to identify whether a American Deluxe Stratocaster is Ash or Alder body?...by Serial Number maybe?

Here's the link for the Am. Dlx Strat. It should tell you everything that you need to know.

http://www.fender.com/products/american ... dNo=011900

It depends on the year of the guitar - the ash-bodied American Deluxes were not separate models during the run of the first version (1998-2003). However, they were always different colors than the alder-bodied versions - during the first run the ash bodies were transparent teal, transaparent blonde, natural, and for a few years transparent purple.

Thanks for the answers. The reason I ask is that I am looking for a good used Ash body model. I looked at a 2004 American Deluxe that a guy has. It is 3 color sunburst with Rosewood fret board, S/N DZ4257091. I am thinking it is an alder body model.

Good point. I forget sometimes that Fender has a babit of making changes.