Up for your consideration, a vintage set of Adlake railroad paddles. Also called semifores. Each paddle is on a track and can be moved side to side. They have a key on a spring to keep them in place in the grooves of the track. The glass is marked Kopp and also 4 1/4, I assume for 4 1/4\" inches. The glass in the blue and red are good and the yellow has some damage I pictured. Seems to be cast aluminum. Approx 15\" tall. Any questions or more pictures needed please feel free to ask. Thanks for your time.

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