K&M (Two-Rock) Modified Fender Bassman?

[ef86pentode]

Ladies & Gents,
I was wondering: does anyone knows anything about the Bassman mod that K&M (AKA Two-Rock) used to do? I appreciate your assistance.
Best Wishes,
MG

 

[ef86pentode]

Re: K&M (Two-Rock) Modified Fender Bassman?

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