That handle was sold by Sears and several other retailers !! I think they are still being made !! If I remember, the axe was made around the 50`s so handle could be original !!
SS is for Super Splitter !! Designed to look like the larger adult axes !! Can`t remember when they started using True Temper !!
Just tighten it up and hang it on the wall,,or use it !!