Remington UMC USA R-2 waterfowl duck hunting knife.  Four blade with chock!  
 
This specific handle is hard to find on this model.
 
Marked "REMINGTON MAD IN USA", and "R-2".
 
Never used!  Light signs of handling only.  All blades work and snap as they should.  SEE PICTURES.
 
4 1/4" long when closed.
 
Location E2