It's a big box Vintage Rat with no LED and an LM308 chip.
Read somewhere that you can tell the manufacture date by the pots. Can't really tell for sure. Maybe an 83? or 98?
Here's some pics.
serial is 3977 9839
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What's everyone's favorite settings? I'll play around with it tomorrow and find something I like.
Also the guy had a natural 78 mustang.