Here we have a rare guitar, an Adamas guitar made by Ovation, the brainchild of Chris Kaman, originally a helicopter design engineer, who founded Ovation in the 1960s. The guitar here is an Acoustics Masterclass, Adamas 1687-8 (1978), which is the second year of production. The guitar sports a Carbon Graphite Top, Lyra-chord Side and Bowl shaped Back. The fretboard is made of rosewood set onto a Mahogany neck set onto the guitar body. This example is autographed inside with Chris Kaman Signature. Not played an Adamas before and must say the sound is outstanding.