Have Mint condition, American Flyer by Lionel, 49833 Block Signal, from 2008, AF # 587. This signal was first catalog by Gilbert, in 1939. It operated like a real system signal. The signal allows one train to follow another on a single track without danger of collision. The signal features signal illumination to indicate occupied block, Metal construction, 7 1/2 inches in height. Postage on this item $10.00.

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