91/NΓ drain in Section ΠΘ ... Scanned 2005 for the 75th anniversary exhibition and publication. 1893 Horizontal (normal) ... 29 May 1936
Inscribed fragment with dedication ... AMS Horizontal (normal) ... 29 May 1936
91/NΓ drain in Section ΠΘ ... AMS 1893 Horizontal (normal) ... 29 May 1936