That head shape (as a felling axe (and even as a potential splitter)) is bizarre by n. American standards and so is a weight of 7 pounds. Why is it, so far, that all I can imagine something like this being used for is in a Monty Python skit? Scale models of popular tools/appliances/vehicles/airplanes have been commonplace for years but 'up-size' of something is not.
If your investment in this project is low and the curiousity factor is high then by all means have a go at trying to haft this thing, and then get out there and beat on a few trees and firewood rounds with it.
Years back an old guy (serious gun collector) showed me an 1887-made 25 pound "top drawer" (William Powell & Sons) British single barrel centre-fire cartridge 4 gauge (1 inch bore 4 inch chamber) shotgun. My eyes lit up when he showed me the factory reloading equipment and Eley Bros-production brass cases that came with it. It might have languished under a bed, in a cabinet or behind glass forever except that he actually agreed to lend it to me. It worked just great but strangely enough I could not find shooting club keeners that were willing to fire it for a second time. The 'whoop' of this thing (at the front and at the back) was substantial even though it ran on traditional black powder!
Your new axe head may fall under that category!