HP 01110-90902 1968 Model 110A Current Probe Operating Note Manual.

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HP 17504-90001 1968 Model 17504A Input Module Operating & Service Manual.

HP 1958 Model 152B Dual Trace Amplifier Operating & Service Manual.

HP Model 1420A Time Base Operating And Service Manual 1968

HP 1957 Model 151A High Gain Amplifier Operating & Service Manual.

HP 1958 Model 153A High Gain Differential Amplifier Operating & Service Manual.

HP 1402A Dual Trace Amplifier ~ Operating & Service Manual