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The Gantry Signal Bridge No. 252 would display either one of the RED or GREEN lamps that were housed in a signal head that was reversible. This signal used a 153C Contact that would be placed beneath the track and would be activated by the weight of a passing train.

Produced from 1961 until 1963, the bridge was of metal construction that was mounted on a plastic base that had a metal grip for fastening the unit. There are no variations.

Dimensions: 7-1/2 inches high, inside height is 6 inches
Base: 3 inches long, 1-1/2 inches wide
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