HP Model 1660A-Series 50/100-MHz State/500-MHz Timing Logic Analyzers, Used

“These were part of a liquidation and original copies were mixed with photocopies. While we do our best to ensure you get original manuals, please be advised that some of these might be photocopies of the original.” HP Model 1660A-Series 50/100-MHz State/500-MHz Timing Logic Analyzers, Used User's Reference