Used on '65 Twin Reverb '65 Deluxe Reverb '65 Princeton Reverb, '65 Super Reverb, '64 Vibroverb, Pro Reverb, Princeton Recording Amp, Concert, Super, Custom Vibrasonic, Showman Amp, Showman 50, '94 Twin, Bassman 300, Bassman 100T, Super Bassman, Sunn Model T, Sunn 300T, Sunn T50C amplifiers.
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