1969 advertisement for Acoustic amplifiers, featuring the Chambers Brothers. From left to right:George Chambers (Gibson Thunderbird bass), Lester Chambers, Brian Keenan, George Chambers, Willie Chambers
$350
$100
$95
$300
$500
$300
$300
$200
$1995
$7000
$249
$995
$450
$175
$800
$400
$2450
$6995
$295
$400