Remember those Nicolet scopes from years ago, when I bought my first scope. Not so much affordable available back than, I had the choice between Tek 7603/7D20 and some weird Nicolet scope, probably a 4094A. I wisely chose the Tek.
Just looked at the specs, the weird thing with those scopes is that the ADC/digitizer is inside the plugins (unlike e.g. Tek7854), so bandwidth/sample rate depends on what kind of plugin is installed.
Plugin specs are hard to find, the info I've gathered so far:
4175: 8bit, 50MSample/s, 16k memory, 75MHz single ended amp, 100mV-40V/div
4562: 12bit, 2MSample/s, 16k memory, differential amp
4570: 12bit, 10MSample/s, 16k memory, differential amp
4580: 8bit, 200MSample/s, 16k memory, 100MHz single ended amp, 100mV-40V/div
4581: 15bit, 100kSample/s, 16k memory, differential amp
F43: more (much so) or less useless floppy disk recorder, probably very expensive back then
