Vintage Camillus Cam-Lock Folding Knife

This is a vintage Camillus Cam-Lock folding knife. On the blade it says Camillus made in the U.S.A ,cam-lock sword brand hand made. On the other side of the blade has the number 7 pat.pending. The switch on front is used to lock blade into a fixed position. In really nice shape. Does anyone know what years this might be from or whY the handle is made up of? The is blade is about 4in long.