There was a"Super Correct" if I'm recalling that accurately. Typical 60's SCM but with black accents. It was loaded with a regular red/black ribbon so I don't know where "correct" came in unless it was a separate mechanism or had the "wrong" ribbon loaded.
The 2nd was a Sears SCM (why are they following me?) with the same SCM body but a strange "power ribbon" that looked like a regular ribbon in weird enclosed spools. I suspect the are motor-driven somehow. That one had the book I really should have checked it. The "Power Ribbon" switch had four colors around it - red, black, blue and green. No idea how that works.
Other than those there were a few 80's ones and a lot of wedges.
online, I found this Underwood and I can't date it or decide if I want to bid on it:
So, if anyone recognizes that model I'd be grateful for any info.