Good to see you typecasting again. That Remington was a nice deal! It's a #1, and when it was introduced it was the only game in town as far as 4-bank portables. The first numeral in the serial number will tell you the year of manufacture in the '20s. For instance, NM44530 would be made in 1924.
PS: I've been wondering about that Remington slogan. Do you think it's true?
It's good to have you back! I hope high school is treating you well. I'm looking forward to more posts as the muse strikes... or doesn't. That's OK, too.