Not a very good one ;[]
The Binson is $5k pulled out of a bay somewhere, for a reason, and this?
I had a thing for weird echos, including the oil can type that kill from 20 paces or at least neuter with long term exposure. They would be hidden in the back at old or dying music stores, "$20 non working" and then you'd own the PCB laden mini Valdez but when they work they are potentially amazing.