Another nice Japanese, post lawsuit guitar from Ibanez
Yours is indeed a 1980 or 1981 AR100 in what looks like brown sunburst. These years were a bit of a transition period for the company from a product identity standpoint - the Artist and Destroyer/Iceman style guitars were here to stay, but they hadn't yet developed the iconic RG (briefly a part of the Roadstar lineup) or S/Saber models, and hadn't yet signed the likes of Vai or Satch.
The body's mahogany with a maple cap, but the beauty (as always) is in the straight-through, 3 piece maple neck. It runs the entire length of the guitar and has no heel to speak of, allowing for easy access to the upper frets.
If the pickups are original they're both V2's, which are medium/medium high output with good high end. The lower toggle is aftermarket - can you tell us what it does? All of the Artist models with the Tri Sound system (series, parallel, and coil splitting for each pickup) had toggles located above the control knobs, like this AR300:
