I think Unknown_K was referring to a monitor most similar to the ST's monochrome monitor: plain black and white and fairly high resolution.

I used to have a 19" (?) SuperMac TPD. I'm fairly certain that it was 1024x768, though it may have been higher. The image was very crisp, albeit a bit distorted due to age. I was doing programming stuff and word processing on the display, and it was great for that stuff. I'm also of the opinion that System 6 software looked best in black and white anyway. Which was great on a IIci.

EDIT: sorry, I missed Kami's post. Kami's the closest.