At 19-21/ΛΘ-ΜΓ. View from west ... AMS Horizontal (normal)
At 19-21/ΛΘ-ΜΓ. View from north ... AMS Horizontal (normal)
At 19-21/ΛΘ-ΜΓ. View from northeast ... AMS Horizontal (normal)
Mixed ... J.H. Oliver ... 1 200 ... 1934, 1935