Hello, I am looking for any information on two C. Jere sculptures. One is a copper maple leaf wall sculpture which is signed and dated 1971. The other is also a wall sculpture made from copper and brass called the Tree of Life and is signed and dated 1978. I have seen copies of this sculpture sell for $460.00 but I do not know what mine is worth. The maple leaf I have never seen nor do I know anything about it. Any help would be greatly appreciated. Thanks