From Collings:
'OM' stands for "Orchestra Model," but 80 years after this body shape was first designed it has become the most popular 14-fret model with fingerstyle guitar soloists who choose to play on steel strings. Yet flatpickers also find it appealing, and when the graceful cutaway is added these OMs are often used by lead players who routinely explore all 20 frets much as they would on an electric guitar. The compact shape makes the Collings OM equally easy to handle onstage or when sitting on the couch, and the relatively shallow body (barely over 4 inches deep) results in balanced tone and an immediate response.
Specs: Adirondack spruce East Indian rosewood back and sides Grained ivoroid binding Herringbone trim with matching backstrip Cross-cut grained ivoroid and wood nitrate strip rosette Pre-war scalloped bracing Tortoise-style pickguard High gloss nitrocellulose lacquer finish Mahogany neck Rosewood or ebony peghead overlay Inlaid Collings Logo Ebony fingerboard and bridge Traditional diamond and square fingerboard inlays Fully adjustable truss rod Bone nut and drop-in saddle Ebony bridge pins and end pin Nickel Waverly tuners 1 3/4" wide nut Hardshell case Serial #26801 4 lb 6 oz