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| Lamps in 28/ΙΘ, from north ... AMS 491 Horizontal (normal) ... 22 Jul 1931 |
| Lamps in 28/ΙΘ, from north ... AMS 491 Horizontal (normal) ... 22 Jul 1931 |
| Lamps under the corner of a large freestanding block at 29/ΙΘ, from south ... AMS 492 Horizontal (normal) ... 22 Jul 1931 |
| Lamps just west of the large freestanding block at 29/ΙΘ, from north ... AMS 492 Horizontal (normal) ... 22 Jul 1931 |
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