Call it Pocket Pal, Escort, Princess - same knife, different scales... and none of them is supposed to be steel.
Year should be 1943-1970 based on tang stamp.
The nailfile can probably narrow it down, but not sure when the crosscut was used.
Corwyn of Multitool, the First of His name, King of Victorinox, King of Leatherman, Gerber and the First Generation SOG, Lord of the Seven Wrenches, Protector of the Forum, Khal of the Bushes, called Corwyn Toolborn, the Unsharpened, Father of SAKs.