This Limited Edition Signature D28 is one of only 97 made and was the Martin Guitar of the Year in 1988.  It is patterned after the 1930's D28 with special in-lays, bindings, headstock, and snowflake fingerboard in-lays. The "pse" designation indicates a special low profile neck which is lightning fast.  . 
This guitar has a couple repaired top cracks. There is some glue around two of them that oozed out when they were cleated. This guitar sounds and plays great despite the top cracks. If you're looking for a great sounding Martin This is the one to have Includes aftermarket hardshell case