jd,There should be two long pins holding the stacked leather on.At the bottom of the handle there is a metal plate which show the two peened pin heads.Just force this plate up and cut the heads or file them off and everything should slide out the bottom.
Then go back w/ what ever you desire.Stacked micarta, antler, bone, ect..Then when finished put the plate on last peen the heads back and sand the spacers as desired.
You'll have a unique hatchet.DM