Putting a wrench on the bottom copyright piece and holding the blade in place allowed me to unscrew the copyright piece from a piece of 1/2" threaded rod that runs the length of the axe. This allows the cap and lower handle to be removed. There is an over sized hole drilled through the lower handle (off center) for the threaded rod. The upper handle is well glued to the rod.
On to the axe head. After futzing with it a while it appears that the brass side plates are glued on. Some judicious prying reveals two pins (part of the side plate zinc casting) anchoring the plates to the head of the axe. A couple of good taps with screwdriver and hammer broke one of the pins and loosed the epoxy joins allowing the plate to be pulled off. Did it again to release the other plate.
Most interesting detail is that the axe head is not 3/8" thick as the advertising says, but is a full 1/2" thick at the thickest part. The ad copy also says that the head is forged tool steel. Will be doing a spark to est to see if this is true.
First two photos show the axe disassembled. Third photo is a close up of the inside of the side plates. Last photo shows the bottom components.
So now what? How to make a sturdy handle for this massive axe head?
Don't think that there is any way a wooden handle made of ash or hickory (strongest woods for axe handles) in the original shaft thickness (1-1/8") would support the weight of this axe head. There is also the design issue that the metal part of the shaft does not extend past the bottom of the blade and so provides no protection to the wooden part of the shaft from a blade cut that glances off the axe blade into the shaft or hits the shaft directly. I suspect that a full strength sword blow would cut straight through a 1-1/8" hickory shaft, chopping the head off the axe.
So what to do? Square steel tubing is available in 1-1/8" (shaft) and 1-1/4" (handle size) sizes so I think that the new shaft will be made of steel. There are plenty of historical examples of axes and maces with steel shafts and I have no doubt that dwarves would think that steel shafts would be a good idea.
Going to have to do some research on how real double bladed axes are constructed.......