One of the rarest and most desired vintage Boss pedals!
These were released between 1979 and 1982, and have become quite rare to find and highly desirable amongst pedal collectors. Best way to describe the sound is as if you had a pedal that replicated the volume swells you do on your guitar with your volume control.
This particular example is super clean and includes not only its original box but also its instruction manual. Serial is stamped and reads 8300 which places it in the first year of production.
