ΞΞ-1 1, 2
ΞΞ-1 3, 4
ΞΞ-1 5, 6
ΞΞ-1 7, 8 XV-30 Section ΞΞ 1 Section ΞΞ 2 ... 26 Sept 1938
ΞΞ-1 9, 10 XV-31 ... 26 Sept 1938
ΞΞ-1 11, 12 XV-32 ... 26 Sept 1938
ΞΞ-1 13, 14 XV-33 ... 26 Sept 1938
ΞΞ-1 15, 16 XV-43 ... 2 Jan 1939