Here for sale we have a nicely played in Martin HD-28. This one Built in 1989 as a R&D Model at the time has been lovingly restored recently it has had the action lowered including a professional bridge plane and top cracks repaired. It is now solid and sounds glorious and is ready for its next player to enjoy. this one is stamped HD-28 R&D and has a plack that says that where there would usually be a serial number so we have come to believe this is that way. comes with hard plastic hard shell case. And lots of mojo,