This is the 60th anniversary edition which was created with meticulously detailed scans of orignal 1961 Les Paul/SG Customs.  This one is marked "DEMO" on the back of the headstock.  It has one small finish flaw on the very end of the headstock also, as pictured.  I can find no other flaws.  Other than that this guitar is mint.  The set up is low and fast, and all notes ring out clearly.
 
All original materials come with the guitar, including the original hardshell case, the certificate of authenticity, the extra blank control cavity cover, the case candy, including the reprint of the original ad.
 
From Gibson.com:
 
A Stunning Reissue of the First SG
 
Gibson Custom Shop is the pinnacle of craftsmanship, quality, and sound excellence. Each instrument celebrates Gibson's legacy through accuracy, authenticity, and attention to detail.
 
1961 brought some big changes to the Gibson Les Paul™; most notably a sleek, all-new, double-cutaway, all-mahogany body design that would later be renamed the SG™. This Gibson Custom Shop model recreates the first Les Paul SG Customs, complete with Custom-style cosmetics, gold hardware, and a Sideways Vibrola™, a side-pull action vibrato that is similar to those found on models from the early 1960s. It also has a bound Authentic '61 Thin Profile mahogany neck, Grover® tuners, an ABR-1 Tune-O-Matic™ bridge, three Custombucker pickups, CTS® vintage-taper pots, and Black Beauty capacitors.