Vintage Screwdriver 1/2" flat tip 9" long, white perfect handle

Description

Very cool looking old screwdriver.  This is from my father's estate.
It's very heavy for it's size.
I haven't found one on ebay that has a white handle like this one.  I think it's some sort of plastic. (?) I thought maybe the wood was removed and replaced with this white material, but the rivets look original. See photos.