Can you identify this propeller?

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Trying to identify this propeller for a customer.

It is 57 inches long with the blade 5 inches wide and tapering to 1/5
The hub is 5 inches with 5 bolt holes
There are no markings

Thank you!

https://drive.google.com/file/d/1cw7...ew?usp=sharing

https://drive.google.com/file/d/1cyH...ew?usp=sharing

[Dbahnson]

It's not for a certificated aircraft and most likely was designed for an ultralight or even a non-aviation application. There's no reason to believe that it is "antique".

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Thank you