Northwest Corner from the south ... AMS 750 Horizontal (normal) ... 17 Feb 1932
Northwest Corner from the north ... AMS 750 Horizontal (normal) ... 17 Feb 1932
Stereo Pit from the east ... AMS 771 Horizontal (normal) ... 19 Feb 1932
Stereo Pit from the wear ... AMS 771 Horizontal (normal) ... 19 Feb 1932
