AMS east Horizontal (normal) ... 12 May 1934
AMS east Horizontal (normal) ... 15 May 1935
AMS northwest ... 1936
Shear's house in the center in Θ (lot 631/20) southeast ... Summer 1936
AMS west Horizontal (normal) ... June 1938
west 1597 ... 16 Jun 1967
west 1595 ... 16 Jun 1967
east Horizontal (normal) ... 12 May 1934