Last Chance on Earth: America's Endangered Wildlife

Interlocking Circular puzzle produced by Springbok Editions in 1967 under license from John Waddington, LTD, Leeds, England.  Mfr #350/#0-107.  Artist is Charles Fracé (1926 – 2005), an American wildlife artist whose work was featured in more than 500 exhibitions, including a solo exhibition at the National Museum of Natural History of the Smithsonian Institution in Washington, D.C. Fracé painted over a hundred paintings from which limited edition prints were produced, which were consistently popular with collectors.  Wikipedia.  Descriptions of endanger for 13 animals depicted on box bottom.  Box also includes 14 tips on puzzling.