A great 1960's piece....MYSTERY KNIFE.  Marked only with "USA" on both tangs.  My guess is that this was made by Colonial but please use your best judgement.  
 
No cracks or chips in the scales.  Both blades fold out as they should.  Good snap left.  No wobble.  Some signs of age on blades.
 
3" total length when closed.
 
It will be protected well and insured.
 
 
Location D2-15