I built it today. Very nice sound!!!

thanks for new schematic!

but it's not 12k
color code of that resister is brown-black-black-red-brown. it means 10k


tone stack value might be right
between 47n and '8'numbered cap at bottom of the board, 10n 22k 100n 1M in there

yes. that One.

but, is it 12k? 12k Color Code is brown-red-black-red-brown
it might be 10k

I think this schematic missed 10k resistor for 2nd BC550C