First step is to drill out the wood around the metal spikes to loosen the head. Some people put them in a vise. No need if you are careful and don't have a vise. You have to remove quite a bit of wood. #repair
Took me 10 minutes. Used a rubber mallet to separate the head from the old handle. You can almost read "Craftsman" on the hammer. No idea how old it is... probably 1970's. Not that old! #repair#hammer
@ai6yr I recommend sanding off the factory finish. I much prefer the feel of lightly oiled wood to whatever lacquer these are treated with in the factory.