Vintage Guitar Magazine - good article about Jess and Oliver Sound Co.
Keith Rosier - great interview with Jess.
Bass Player TV - 2007 video interview with Jess and Dino Monoxelos.
Oliver Powerflex P502 - Click on the link to the left to see a page full of photos of an Oliver P502. I purchased the amp in March of 2008, and did a complete cosmetic restoration.
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