Hello everyone! I have had an EB volume pedal since 1986 or 87. It was given to me by my uncle. I do not have any idea how old it is or any particulars of it. It seems to be a mono side input and output w/ a swell control (?). There is a 250k pot connected to that control. Any one out there that could give me more info on what this puppy is, I would greatly appreciate it.