Tektronix 7B87 Time Base 7854 7000 Series Oscilloscope Plug-In Module (nice)

Tektronix 7B87 Time Base Plug-In Unit - Works

Tektronix 7B85 Delaying Time Base 7000 Series Oscilloscope Plug-In Module (nice)

Tektronix 7B53AN Plug-In Module Dual Time Base for 7000 Series Oscilloscopes

Tektronix 7B92A Dual Time Base, for 7000 Series Oscilloscopes - Parts/Repair

Tektronix 7B53A 100 MHz Dual Time Base Plug-In Module 7000 Series Oscilloscopes

Tektronix 7A26 Dual Trace Amplifier Vertical Plug-in for 7000-series scop

Tektronix 7A13 Differential Comparator Plug-In Module for 7000 Series Oscillosc