Targetted at the Arabian music market, Ibanez guitars recently released two limited-production guitars. Part of their Oriental Series -- the KMM1 Extra-Fretted and the KMA1 fretless acoustic nylon-string.
The KMM1 Extra-Fretted is based on the typical Ibanez S-series shape but with additional frets, allowing for quarter-tones between the 2nd, 4th, 5th, 7th, 9th and 12th frets.
The KMA1 acoustic nylon-string features the same but as inlaid fretlines on a fretless fingerboard, making it more similar to an oud.
The KMM1 and KMA1 are currently only available in the United Arab Emirates and Kuwait.
(Pic Source: ibanez.co.jp)