No serial and the sticker residue might mean it's an LACS. I believe they put on serial numbers with a cheap sticker. I'm not a huge ibanez fan boi, but I'm not familar with a production guitar that looks like that. The lacking inlay, fixed locking bridge, binding, and control layout all look unusual but not unheard of for a production Ibanez. Maybe it was refinished, but I'd lean LACS.
Edit: definitely not LACS based on the pics below.