DOD 680 Analog Delay

The DOD 680 had at least two versions. The early version had a mini toggle switch and used the Reticon R5101 CCD chip. The later version used a Reticon SAD4096 BBD chip. I have seen the 571 both populated and unpopulated on 4096 circuit boards I've seen, so I think there are at least 3 versions of this pedal.

Notable features include a very direct clean path, reasonably high input impedance (roughly 1M), the unusual dual outputs with individual mix controls, and an unusual bypass switch.

DVE prefers the 680 in front of a Marshall.