Off the top of my head:
(I am lying here with one eye open watching Inglorious Bastards and Pulp Fiction)
The a Case is a 6231 1/2 I take it? You have the date correct.
The Remington is a contract knife. Old (original era)but not a "genuine" Remington. Or maybe I should say, not actually mfg. in house by Remington.
I'd have to look the KC model # up in my archives. But that's easy enough. No other markings on it?
I can give more info when coherent.......