Mounted on clock. Globe mounted on clock. A mechanism turns the globe one hour of longitude on the hour. National Geographic Society. Melville Bell Grosvenor.
Cradle mount with horizon ring.
Machine made for National Geographic by Replogle Globes. Cartouche 12 inch Torica Celestial Globe. Label 7 inch Torica Astro Globe. Made in Japan. Collection of Elliott Swanson.