MXR CSP28 76 Vintage Dyna Comp A vintage reissue model that replicates the parts, internal circuitry, and internal structure of the 1976 Dyna Comp as much as possible. Compared to the standard Dyna Comp, this model had a lower production run and is a discontinued product, making it a rare item. Power-on confirmed. There are scratches overall. Please check the photos. * Operates on batteries only.