I got this on ebay a week or so ago. The guy had it listed with a $199 BIN. I replaced the battery snap, the knobs and cleaned it up inside and out. The balance knob was very scratchy but some deoxit made it like new. A new guide bushing from Roland and it's done. It was made April of 1978 and is one of the rarest Boss pedals. I just wanted to share it with yall. The first two pics are from ebay the others are after I messed with it. It sounds incredible in front of a TS or a chorus. Enjoy!

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It's my first time to try to post pics to this forum and I could only get links to show. I'll keep working on it. If yall have any pointers please let me know.

Sorry about flubin the second pic, just envision the bottom of a Boss pedal

First time I ever see this one... sorry for the 'dumb' question but what does this do to your sound?

Lets you accentuate a choosen frequency. I have heard them likened to a fixed wah, but it doesn't sound like any wah I have heard. I think the freq. is different from a wah. I like it's subtle coolness.

Ok something along the line of an Aural Exciter cool

You got a great price, I have seen SP-1's that were more beat up than yours going for over $500!

TheGrooveking

It's a single band parametric eq. Fairly limited in its use, hence probably the reason that it is so rare. But 200 yo-yos is a small price to pay for a little piece of history.