From east. X=Disturbance behind Drain ... AMS 1387 Horizontal (normal) ... 4 Apr 1935 ... Ζ
From east. X=Disturbance behind Drain ... Scanned 2005 for the 75th anniversary exhibition and publication. 1387 Horizontal (normal) ... 4 Apr 1935 ... 2009.03.0151 (Section Ζ 176) ... Section Ζ 176 ... Section Ζ 176