Screaming Bird Treble Boost (Assorted Graphics)

Effect Information

Appears to be several versions of this effect with different graphics over the years. Not knowing if there are differences in electronics (which I suppose there are) I have lumped them all into this one category. This style may have been made 1975-79. Are the internal electronics identical to the different graphics/versions that appear on this effect — I don’t know?

Any additional information on this effect is appreciated, version specifics, etc.

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