via this auction "Serial # is 25506. Unit shows its age, with its share of scuffs and scratches, but is in pretty good shape overall. Has lots of flutter -- with longer delays, it's like having a slight chorus on all the time. Not obvious on short/slapback delays. This particular Echoplex has GREAT runaway feedback! Case is in good shape (but has no handle). 3-prong AC cord may have been an upgrade at some point.
Includes one almost new (maybe used for an hour or two) Tubeplex (Mike Battle) tape cartridge."
