This 2640  has a K79 serial, so made in November 1979. Most catalogs show it as model 2640.
But the German catalog from June 1980 presents this guitar (still with Super 80s) as AR-1200AV It can be seen in the last pic of the gallery below..

Anyway, it’s a heavy beast, as expected it plays and sounds really great.

The condition is pretty good, just some small scratches on the back an a small ding on the upper part of the body.
All electronics work, pickups and tuners are all original, frets seem to be almost unplayed. Even the gold plating of the Super 80s is in great condition in contrast to most PUs of that era.

The pictures show speed/barrel knobs except of one. In between I changed them to period correct Sure Grip knobs from Andy/porkpie.
Both Gibraltar bridges show the usual wear – so it has been played but had a careful first owner.

Specifications

Owner:
Dire Wolf

Brand:
Ibanez

Instrument type:
Double Neck 6/12 String

Series:
Artist

Model:
2640AV

Original factory condition:
Yes

Serial number:
K795309

Year of manufacture:
1979

Neck type:
Set Neck

Neck material:
Rock Maple - Smooth Heel

Tuners:
Velve Tune II w. W-Buttons

Nut:
Half Bone/half brass

Fretboard:
Ebeony, Abalone Dot Inlays

Number of frets:
22

Bridge type:
2 x Gibtaltar I

Body material/wood:
Mahagonay with Carved Maple Top

Finish:
AV

Pickups:
4 x Super 80 Tri-Sounds

Knobs:
SureGrip I

Wiring/Controls:
Individual volume and tone for each neck.
Master volume.
Three way pickup toggle switch for each neck.
Three position neck selector switch.
Two Tri-Sound switches for each neck.

Hardware color:
Gold plated

Links:

http://www.ibanezcollectors.com/forum/index.php/topic,35030.msg284587.html