Four blade winch or generator propeller?

[Robert Lundin]

I have this four blade propeller which I assume is a generator or winch propeller. I would be very interested to learn more about it. 66cm diameter.

[Dbahnson]

I think it would be hard to identify without any other information, such as the manufacturer, but even then there is no good resource for these, in my opinion. It could even be a drone propeller or an industrial fan blade.