Smith Island Lighthouse original Fourth Order Fresnel Lens can be found at the Museum of History and Industry (MOHAI) at Lake Union, Seattle, WA.
This Fresnel lens was made in 1884 by Barbier and Fenestre in Paris for the Smith Island Lighthouse built by the Coast Guard in 1858.
Both the lantern house and the Fresnel lens were rescued from the Smith Island Lighthouse prior to its demise by Jim Gibbs in 1964 after obtaining permission from the Coast Guard.
The lantern house was built into a private structure (later to become a certified lighthouse) at Skunk Bay, WA (near Hansville, WA). Note: lens inside the lighthouse is a replica lens.