A friend of mine, owner of a storage unit/industrial facility got a beautiful Sensenich wooden prop in a trade for some homebuilt stuff one of his renters had left. He installed it on a Waco biplane he had rebuilt and made a short test flight. Afterwards I pointed out that it had a split along one of he laminations.
He called Sensenich and asked them about it. They replied that some of their WWII props might have a tendency to do that.
He split the prop open with a butter knife, applied some glue, and clamped it. Then he put the prop back on the airplane and ran it up on the ground; it split in another spot. The prop was sold as a wall-hanger decoration.