Old...antique...and beautiful!  Authentic Schmidt & Ziegler 3129 muskrat pocket knife.  GENUINE BONE  scales.
 
Nice scales!  No cracks or chips in the scales.  Bolsters are in good shape and could use a little cleaning.  Both blades open and close.  All pins are secure.  Both blades have really good snap.  Very light signs of use on one blade.  Shield has some build up that may buff out.  SEE PICTURES.
 
3 7/8" long when closed.
 
Made in Solingen Germany.  Knife marked throughout as seen in pictures.
 
Location D2-19