| January 1921, No. 275 | Canadian Railway and Marine World (Toronto) | Page 10, col. 2 |
Grand Trunk Railway construction, betterments, etc.
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Pontiac signal plant.—A press report states that an order has been given the General Railway Signal Co. for a Model 2 unit-lever-type electric interlocking signal for Pontiac, Mich. (Dec., 1920, pg. 650.)
Railways: G.T.Ry.