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| Drain ... AMS 61 Horizontal (normal) ... 2 May 1932 ... Drain. |
| Drain ... AMS Horizontal (normal) ... Drain. |
| Drain ... AMS Horizontal (normal) ... Drain. |
| Drain ... AMS Horizontal (normal) ... Drain. |
| Drain ... AMS Horizontal (normal) ... Drain. |
| Drain 4, Drain 1, Subsidiary Drain 2, and Drain 2. From the south ... AMS north 673 Horizontal (normal) ... 1 May 1932 ... Drain 4, Drain 1, Subsidiary Drain 2, and Drain 2. |
| Drain 4, Drain 1, Subsidiary Drain 2, and Drain 2. From the south ... Scanned 2005 for the 75th anniversary exhibition and publication. 673 Horizontal (normal) ... May 1932 ... Drain 4, Drain 1, Subsidiary Drain 2, and Drain 2. |
| From south (slightly east of above). From left to right: Drain 1; Drain P; Drain 3; Drain 4H; Drain 4; Drain 8 ... AMS Horizontal (normal) ... From left to right: Drain 1; Drain P; Drain 3; Drain 4H; Drain 4; Drain 8. |
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