wooden propeller

[happie]

Hello,
I found a wooden propeller with the number AD 543-RH / 90 HP CURTISS . I am curious about the age and origin.
As you can see is it made to something different. Does anybody know, is it from an airplane or airboat. Are the tips of the prop been cut of or is it actually a short model. For anyone who can give me some answer thank you for that. For the right size of photograph open photo in new page. Greetings Simon[IMGA][/IMGA]