Marshall KT88 Single Vacuum Tube Used & Tested | eBay
Electro Harmonix KT88 Matched Quartet
Vintage 1968 Park (Marshall) 50 Black Plexi JMP Valve Amplifier Head w/ GEC KT88 | Reverb
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10 pcs 8Pin Octal Tube socket for EL34 KT88 Fender Marshall AMP Chassis Mount | eBay