Boss OD-2 Turbo Overdrive. Missing label on the bottom but seems to be an older version. Probably black label made in Taiwan but cannot prove it.
The OD-2 was created as a replacement for the OD-1 in the mid 1980s. The OD-1 was already legendary so following up to it was in impossible task. The design goal was to create a pedal with two modes. In mode one its sound should be similar to the OD-1 but in the turbo mode it should have more distortion and more gain. A tone control is included to give the user better control over the sound. The OD-2 is built using only discrete components (no integrated circuits).
