Hi there!

I am about to buy a BOSS DD-3 from someone.
Its a made in japan version, but the DD-3 normally has all blue knobs right?
His has gotten one white, one orange and two blue knobs.

Is there a difference in the version or w/e?


Probably not. I haven't seen anything like that. Though I haven't looked that hard. My opinion is that they are just random knobs put on there to tell each knob from the other.
You can call Boss / Roland and ask. They are always helpful when I call.