John Greven began working for George Gruhn at Gruhn Guitars in the late 1960s repairing and restoring vintage acoustic guitars. Having now established his own custom guitar building workshop in Portland Oregon he uses his experience of working on vintage instruments to recreate the look, feel and sound of the best pre-war acoustic guitars. Greven builds his guitars one at a time - priced from around $4,200 to $12,000 depending on the type of wood chosen and the amount of ornamentation or custom work.

Source: Greven guitars website (21 August 2017)