These rare HD-28 CTB's are Gems and are exquisite! Martin HD-28 CTB (Custom Tortoise Bound) was a very rare "Guitar of the month" in 1992. I played this guitar as new at the shop side by side with a new Martin D-45 Deluxe, a Martin D-41, also top of the line Taylor's, Gibson's, Collins, etc... This Martin HD-28 CTB BLEW THEM ALL AWAY in pure, magical tone & sound.