Boss SD-1 Super Overdrive. Made in Taiwan Black Label. Serial # dates in Feb. 1993. Definitely has an aged smoothness/warmness that newer SD-1's don't have.
I bought this pedal with the intention of modding it but I never got around to it and my pedal boards (2 BCB-6's and 3 BCB-3's) are all full now and that is my signal to stop now.
Pedal has minor nicks/scratches but is in good working condition.