Paul Gruen's guitars are aimed at Gypsy style jazz players looking for an alternative to the Selmer and Maccaferri style instruments. Gruen's guitars combine elements of Selmer Mac, archtop, and flattop construction, to produce a sound which has the bite and projection of Selmer Macs, coupled with more warmth and sustain. Tone is variable by inserting wooden "stoppers" into any one or two of the four oval soundholes. Gruen's guitars are available in 16", 17", and 18" lower bout widths, and in various woods. Circa 2017 Paul Gruen was not building guitars and his website was inactive.

Source: Gruen Guitars website