Schrade Cut Co early large Bone double full bolsters

Schrade Cut Co large double with picked bone scales and full bolsters. This is the largest double that Schrade made measuring 3 3/4" closed and a little over 8 inches with both blades open. It was designated the model 7503B. The main clip blade is marked SCHRADE CUT CO WALDEN NY and the small blade has three patent dates 06, 07 & 10 so most likely made before 1916. Both blades are about 95% full and mostly shiny with a few light scratches and some pepper spots. The pick bone scales are in excellent condition with no cracks. The knife works well. Main blade tip seats below liners and the pen blade peeks just a bit. Both open fully and lock open well. Large blade has approx 3/16" up and down movement when open. Both safeties work. Very nice example of an early large Schrade double switchblade.