BOSS BF-2 Analog Flanger 1981 Vintage Guitar Pedal Made in Japan Silver screw,1981 Boss BF-2 Flanger (Black Label) Purple > Effects | A Flash Flood of Gear,BOSS BF-2 Analog Flanger 1981 Vintage Guitar Pedal Made in Japan Silver screw,BOSS BF-2 Analog Flanger 1981 Vintage Guitar Pedal Made in Japan Silver screw | eBay,NPD - Boss Flanger BF-2 (1994) : r/guitarpedals,