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Tektronix TU-2 Plug-In Unit Test Load Laboratory Oscilloscope Accessory B.23

Tektronix 3A6 Dual Trace Amplifier Oscilloscope Plug-In Module Vintage B.59

Tektronix 3A8 Operational Amplifier Plug-In Oscilloscope Module Vintage B.36

Tektronix 3A7 Differential Comparator Oscilloscope Plug-In Module B.189

Tektronix Type 80 Vertical Amplifier Plug-In Unit Vintage Oscilloscope Mod B.62

Vintage Tektronix Oscilloscope Type 422 Oscilloscope W/ Original O&M Manual