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| Close view of the Tile Standard on its base ... AMS Horizontal (normal) ... ca. 1947 |
| Close view of the Tile Standard on its base ... Horizontal (normal) ... ca. 1947 |
| The tile standard ... AMS southwest 2496 Horizontal (normal) ... August 1967 |
| Tile Standard on its base. Photographed for Mabel Lang ... AMS Horizontal (normal) ... ca. 1959 |
| Tile Standard on its base. Left, A 1283; right, A 1133 ... AMS Horizontal (normal) ... ca. 1947 |
| The tile standard ... southwest 2496 ... August 1967 |
| Tile Standard on its base. Left, A 1283; right, A 1133 ... Horizontal (normal) ... ca. 1947 |
| Tile Standard on its base. Photographed for Mabel Lang ... ca. 1959 |
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