Bach 42K / 42BO Trombone - interchangeable valve sections
From a professional musician. https://brucemelville.com
Thank you for contacting Mearto. This is a Bach 42BO trombone.
Below I have included links to asking and hammer prices for this model.
I could not find a model called 42 K on the Bach site. I did see this on trombones for sale and have listed links below. If I am misunderstanding the model, please let me know.
Yours appears to be in very good condition and I have taken this into account in my valuation.
Serial number 31042, 1977-78:
Model info 42BO:
Bach 42K trombone asking prices:
$499, ‘poor condition’
42BO asking prices:
$2999, condition unclear
$2749, ‘mint’ 42BO