Boss RC1 Super Overdrive
40th Anniv
(Serial number：DS-1-4A)Limited Edition DS-1 Distortion
The DS-1 Distortion was introduced in 1978 as part of the second wave of compact pedal releases. Its hard-edged attack and smooth sustain was an instant success among guitarists, going on to fuel the signature sounds of numerous rock legends. The DS-1 has enjoyed such enduring popularity that’s it’s remained in the lineup to this day, outselling every other BOSS pedal to date.
https://www.boss.info/global/promos/40th_anniversary_compact_pedals/