This is a DM-1 original, late model. I think it's rare to find one in such good condition. I've owned three each of the early and late models, and I kept the one that was the most usable as a delay. The delay time is longer on the late model, making it easier to use in modern music, and for some reason, this unit has a texture that's like a cross between the early and late models, with a sound that blends in smoothly without blurring the edges, which I liked. The delay sound changes depending on the quality of the power supply, which is unique to analog delays, so I recommend trying it with various power supplies. I'm selling it reluctantly to raise money... Body only, no price reduction is possible.