Today's "left at the Goodwill because I couldn't justify it:"
A tiny black-and-white CRT TV designed to fit into a stereo equipment rack so it could be used as a oscilloscope-style analyzer.
It was badged JCPenney. The store whose current claim to fame is "we outlasted Sears" actually had an inexplicably good range of own-brand #vintageaudio gear, usually labelled MCS.
See https://www.radiomuseum.org/r/penney_mcs_vtr_component_tv.html
$80 was too rich for me, but I'd love a modern take on it as a DIY kit using a Pico and LCD.