I'm pretty sure it's 60s or 70s.

Not worth THAT much... $50-$100 at the most in my opinion. Besides this however, they are wonderful for typing if you don't care about value.

merrick wrote:

Do you know what type of Remington it is?

It's a Remington Model 24, most likely manufactured in November 1965. The prefix is often a country code; does it state anywhere on the machine's case where it was made? The 'N' could represent 'Netherlands' (or even the NJ for that matter). For example, my Model 24 was manufactured in Canada and the prefix begins with 'C'.
 

Remington was parsimonious with their model numbers. First they crept up from 1 to 12 in their petty pace then in a fit of marketing extravagance leaped to 20, 30, even 50 and 60! Horrified by what had been done they went back to 17 and put begrudged a mere 24 to one of the last. "You young Turks don't realize just how much goes into a model number" said the old guard. But what about the named Super-Riter? It sneaked in as an overgrown portable.

The Remington 17 and the B-17 bomber would have rolled out around the same time and the first Super-Riters do not seem to have been labeled Super(man) so they were not above hitching a ride on a popular name.

For $50 + shipping it's yours 

Since I rather give it to someone who actually cares about typewriters than sell it to some hustler I'm willing to give you the typewriter for free. It would only cost you shipping.