Tek 7B87 400 mhz time base w/ pretrigger acquire clock

What is for sale: Tek 7B87 400 mhz time base w/ pretrigger acquire clock

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Tektronix 7B87 400MHz Time Base w/ PreTrigger Acquire Clock
* The model 7B87 is a single time base with Pretrigger Acquire Clock, designed for use in the Tektronix 7854 mainframe oscilloscope, but can be used in any TEK 7000-Series mainframe, to provide triggering to 400 MHz.
* The 7B87 features pretrigger capability when used in the B horizontal of the 7854 mainframe. Pretrigger allow you to view what has occurred before the trigger event in single shot applications. The amount of pretrigger time is determined by the Acquire-Stop delay time setting. The total amount of pretrigger is 0.2 to 9.9 times the time/div setting.
* The INT Divide By 1000 control reduces the stored time/div to 1000 times slower than the real time display on a 7854. This does not, however, affect the Acquire-Stop delay time. The INT Divide By 1000 control allows stored sweep speeds from 10 ms to 5000 s/div for slow speed applications. An EXT Clock-In connector is provided for clock frequencies other than that offered by the INT Clock of the 7B87.
As long as seller is notified before the 3 day inspection is up the item can be returned
Even though I am familiar with most of the equipment I am not a technician and can not check this item out beyond a basic power up and/or self test if that function is available. I try to describe as accurately as possible and list as much as I know about the item. I also pop the covers when able and inspect for missing or burned components, water damage, obvious signs of attempt at repair, and anything else that is obvious to someone with a limited technical background
That Means WE WILL NOT BE RESPONSIBLE FOR LOST OR DAMAGED PACKAGES.