 One thing which hampered the instrument's popularity in the ensuing years was the narrow neck width (1-5/8" at the nut, as opposed to Gibson's standard nut width of 1-11/16").Gibson developed the ES-350T from the Byrdland using less-costly hardware and detailing, and offered it as a less expensive model.From 1955 to 1960, Gibson made the Byrdland with a rounded Venetian cutaway.