This is a vintage 1980 Ibanez Overdrive II OD-855 electric guitar distortion effects pedal. This particular example is in extremely excellent condition. This variety OD-855 is almost identical to it’s concurrently produced TS-808 counterpart, sharing a similar schematic and the coveted RC4558P chip. Like the more famous Tube Screamer, both pedals are incredible at creating beautiful overdrive with rich harmonic overtones. Its warm, mid-boosted tone is what made it popular with many blues and rock players. This is a very nice example of a rare pedal. It was apparently attached to a pedal board at some point, and the original rubber bottom pads have been removed (though the original plates are intact and installed.) It is quite clean otherwise, and surely the bottom can be restored rather easily.