The 2618/12 is a twelve string Artist series solid body electric guitar model introduced by Ibanez for 1977. It was made in Japan by FujiGen.
The 2618/12 features a carved maple top on a double-cutaway mahogany body mated to a set-in three-piece maple neck with a smooth heel and a 24-fret rosewood fingerboard with binding and abalone dot position markers. Components include a pair of Ibanez Super Single humbucker sized single-coil pickups specially developed for this model mounted in cream pickup rings with individual volume and tone controls, a Gibraltar Tune-O-Matic style bridge and special stop tailpiece with integrated "cloud" ornament, a brass and bone nut, rubberized Sure Grip control knobs and VelveTune machine heads.
The initial 1977 design had an alternating tuning machine setup (a la Rickenbacker) with 6 tuners mounted conventionally and 6 tuners mounted on the side of the headstock oriented at 90º to the others. The front of the headstock was partially cutaway to allow the strings to reach the side-mounted tuners. This design was shelved by 1978 in favor of a more traditional 6-on-a-side layout on an elongated headstock.
The 2618/12 was renamed the AR350 in mid-1979 in at least the US market, although it continued to be sold as the 2618/12 in Europe. The 2618/12/ AR350 was discontinued after 1980 in favor of the 22-fret AR112.