It's a wood library model so maple neck, slightly better wood's I'm guessing for the body and top as well. It has an ebony fretboard as well I think the core models are rosewood. Correct me if I'm wrong though.
The Core Models are Indian Rosewood. The Wood Library ones can be whatever the Dealer selects, typically we have seen Ebony or Brazilian Rosewood. I have seen one dealer do Cocobolo on DC 594's (Wild West).
They can also select Rosewood or Maple Necks, or even Korina Necks, or Korina Necks
and bodies. Righteous Guitars did a run of DC 594's with Korina Bodies and Necks with Brazilian Boards, they were AWESOME, I owned two but have since sold them as I have shifted my collection to be more SC-centric. Righteous Guitars does have a run of SC's on order as well with the Korina Necks and bodies. Moore Music Guitars has a run on order with Korina Necks and Mahogany bodies.
They also get to select the Bird inlay types, and typically most have been doing the Black Paisley Case upgrades. Willcutt Guitars has been doing theirs with Brazilian Boards and MOP Old Birds, I really like that combination, I like the Old Birds better than the "J-Birds". Quilt tops are available as well. All of these things can add cost, of course.
The dealers hand-select the tops and boards, and that top on yours was a GREAT choice, obviously!!
The Core SC 594's are great, but it is really nice to have these Wood Library options, with hand selected Tops and Boards! I am looking forward to (and very afraid of!) more Wood Library SC 594's showing up in US dealers. (Actually I am MORE afraid of more Private Stocks showing up in dealers, I have a harder time resisting those, apparently!!)