That is indeed an authentic pre 1940 Remington knife. I would say that it is either a R7103 or R7104. Its kinda of rare to see a manicure blade along side of the main blade, normally they are on the other end. If its a R7103 it used to have bone handles, R7104 had pearl. You could probably soak the knife in kerosene and take some steel wool , clean up the tang of the main blade and be able to see the number. The blades look to be nearly full, with a little work that would make a very good everyday carry knife. The more I look at the knife the more I think its a R7104. The pearl handled variety didn't have a shield, the bone did, I don't see any holes where the shield was pinned. Its not quite 90 years old, 75 years old is quite possible though. The tipped bolsters are a nice touch. Very nice find.
