THIS IS AN OLD CASE XX!  Right from an estate sale. 
 
CASE XX model 11011.  Made between 1940 to 1964.  
 
Condition:  Handle material has no cracks or chips.  Opens as it should.  Perfect snap at half stop, full open, and close.  The blades have light signs of use.  Buff out the blades and have yourself a $200+ knife!  SEE PICTURES.
 
4" long when closed.  Single hawkbill blade.
 
Buff out the blades and have yourself a $200+ knife!  

 
Location D2-21