Good old pocket knife from an estate sale out of Newark Ohio.
 
Rare model with angled bolsters!  I believe this was made between 1940-1964.  Marked Robeson Shuredge, USA, and 633728.  
 
Both scales have no cracks or chips.  All bolsters are in good shape.  2 of the 3 blades have snap.  Some signs of age on on blades and scales.  SEE PICTURES.
 
Black delrin scales.  You can still see the faint outline of "Robeson" on the front scale.
 
3 1/4" long body when closed.  GOOD CHANCE FOR A COLLECTOR.  
 
Location D2-35