Rare 15D road marker in Morton Grove #mortongrove Rare 15D road marker in Morton Grove built in 1937. 15D refers to a part of an old Illinois gasoline tax bill for concrete roads built by counties that would be maintained by the state. #mortongrove
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Rare 15D road marker in Morton Grove #mortongrove Rare 15D road marker in Morton Grove built in 1937. 15D refers to a part of an old Illinois gasoline tax bill for concrete roads built by counties that would be maintained by the state. #mortongrove



Rare 15D road marker in Morton Grove #mortongrove Rare 15D road marker in Morton Grove built in 1937. 15D refers to a part of an old Illinois gasoline tax bill for concrete roads built by counties that would be maintained by the state.

Rare 15D road marker in Morton Grove #mortongrove Rare 15D road marker in Morton Grove built in 1937. 15D refers to a part of an old Illinois gasoline tax bill for concrete roads built by counties that would be maintained by the state.

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