That “catching up” feel points to a daisy wheel electric, not a Selectric, and the red ring on the knob was pretty common on Smith-Corona and Brother machines. Look at Smith-Corona SL470 or SL580, Brother EP-44 or EP-43, and Panasonic KX-R series, all mid-80s and very similar in sound and behavior. Any of those with a soft carry case would scratch the same itch even if it’s not the exact model.