Canadian. 1950s. Double sided metal with reflective script. Marked, "S.T.S.P 2510" lower edge (nearly indiscernible due to surface losses). Minor impact to left edge. Moderate loss of applied reflective matter. Surface losses with accompanying oxidation at lower margin. Scattered scratches, minor to moderate staining and a small dab of green overpaint on one side. Gary Archer Collection. 20.75" x 27.75".