Hello there, and welcome to the board!
I am certain someone with more knowledge of the product line will chime in, but a quick google check of 2011 "Ltd" shows a
Spring Ltd with mahogany. Do a google search and you'll find some old listings with pics, appointments, etc. for this "Spring Limited." But for a definitive answer, call the factory with your serial number and they will give you the entire rundown of its full build specs.
As for a cutaway, this is not uncommon for a "ltd," though yes, a "DN" normally does means sans-cutaway in their nomenclature. And the 300s made with sapele b/s is a first-cousin to your mahogany. Some prefer the former species, others the latter; like all things "tone" personal preference abound but to my ears, I've always tended to favor mahogany's timbre as it has always striked me as slightly "thicker" in the mids and mid-lows, at least in my experience (though no disparagement to 300s in any way whatsoever!).
And as is tradition 'round these parts, post a pic when you can and we'll all celebrate with you!
Edward