Boss DS-1-4A Distortion (Black)
"To celebrate 40 years of hard rocking, Boss are releasing a limited edition makeover of the legendary DS-1 Distortion Pedal! Built only for 2017, in limited numbers, the Boss DS-1-4A 40th Anniversary Edition features a sleek black body, gold lettering and knobs and a silver thumbscrew. This classic pedal has stood the test of time and can be heard on countless recordings and performances over the decades. Grab your piece of history, as the DS-1-4A Distortion Pedal is strictly limited."
These slightly differ from the DS-1 BK, using a silver screw and slightly different coloured font.