Κ-20
Κ-20 ... 1960
Poros Aqueduct and Road at Southwest Corner of Heliaia ... Κ-20 3922, 3923 ... February 1961
Κ-20 3932, 3933
Κ-20 3934, 3935
Fill over Pre-Heliaia Houses under Northwest Corner of Heliaia ... Κ-20 3936, 3937 ... 25 July 1961