units: 072 early.

units: 111, 112, 113, 114, 115, 221, 222, 223, 231 all late.

units: ( 061, 062, 064, 066-068, 071 early ),  072 mid, ( 073, 074, 075 early ), 078, 104, 105-107, 108a, 108b, 109, 121, 131, 132, ( 111, 112, 113, 114, 115, 221, 222, 223, 231 early ), 241, 242.

units: 051 late, 061, 062, 064, 066-068, 071, 072-075, 076, 077, 079, 081, 161-164 all late.

units: 051 early, 065, ( 076, 077, 079, 081 early ), 161-164 early.