Silver Knob With Numbers

[sunnfanpsyche]

I am wondering why the Sunn Concert Lead that I bought used has Silver Knobs instead of black knobs.I have a replacement set in black but if the silver ones are a sunn variation then I might keep them with the amp.This amp does not have a stand up from the board style variable resistor on the power amp board and is a little different.Maybe theywent to a different Sunn amp or something.

[loudthud]

Hard to say without a picture but I don't remember any silver knobs. Different years of the concert series used different knobs usually fender like skirted knob with numbers 0-10.