BOSS SD-1 SUPER Over Drive Guitar Effects Pedal MIJ 1981 #272 NEC C4558C DHL EMS
£152.15
Operational Amplifier: NEC C4558C. (You receive a boss pedal guide bush (O-ring rubber) for free. ). Drive knob made a noise (crackle), but there is no problem in the performance. This noise disappeared when each knob was turned repeatedly.
