Wood used to make Paragon HS-1 props?

[Kazookid]

Hi- I’m trying to determine the wood Paragon used to make the 4-bladed HS-1 propeller used on the Curtiss HS-1L flying boats. The manuals do not give this kind of detail. We are trying to update signage on or HS-1 prop and were hoping to include this.
Any help is appreciated!
Regards, Kevin,
Kalamazoo Air Zoo volunteer

[Dbahnson]

Paragon propellers were typically made using oak lumber.

[Kazookid]

Thanks!