ΝΝ-1 23, 24 XV-34 ... 2 Jan 1939 ... XV-34
ΝΝ-1 25, 26 XV-35 ... 2 Jan 1939 ... XV-35
ΝΝ-1 27, 28 XV-37 ... 2 Jan 1939 ... XV-37
ΝΝ-1 29, 30 XV-42 ... 2 Jan 1939 ... XV-42