They are a premium prop
I have a slightly different model on my Bucker. They are of excellent quality and you should be able to fetch top dollar if you can find the right buyer. They are far more common in Europe being of German origin.
You can read more about them by doing a search on the web but they are basically a very sophisticated wood prop.
I would buy one in a heart beat if it fit my application.
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Smart People do Stupid things all the time. I know, I've seen me do'em.
RV6 - Builder/Flying
Bucker Jungmann
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.
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