Welcome to AAPK! Start in the “ RESEARCH” section here (found up there at the very top of the page in the light gray header). Click on it, which will take you here https://www.allaboutpocketknives.com/page/research.php
. Scroll down until you find Remington. Have fun!
Nice knife, still has a lot of life left, or could be collectible depending on your preference.
May be a reproduction if the handle covers are Delrin (plastic). Hard to tell for sure from your pictures but I’m guessing that may be the case.