Boss SG-1 Slow Gear Effects PedalAll Original, Made In Japan Black Label Silver Screw Model, Serial Number 108700 Produced September 1981       "The Boss SG-1 Slow Gear is one of the rarest boss pedals and was produced in Japan by Boss in the early '80s.  The effect replicates the sound of a guitarist rolling their volume knob to give a somewhat tremolo- violin like sound but with a dynamic all its own. Slow Gears are exceptionally rare when compared to other Boss pedals making them one of the most valuable to vintage pedal collectors"One if the hardest pedals to track down from the Boss catalogue, even harder to find with original box and manual There is more information and demos on the internet about this unique pedal only produced by Boss for a short timeThe box shows some age but the pedal with only very minor cosmetic wear is in excellent used cosmetic condition for it's 35 years! See PicsSpecifications Controls: