AMS Horizontal (normal) ... ca. 1948
G.P. Stevens ... No PD. Not for circulation. southeast Horizontal (normal) ... 1948
AMS Horizontal (normal)
John Travlos ... AMS southwest Horizontal (normal) ... 16 Dec 1948
AMS northeast Horizontal (normal) ... 1948
AMS southwest Horizontal (normal) ... December 1948
AMS northwest Horizontal (normal) ... March 1949