used NANKING: A selection with 22mm diagonal overprint on 1c. (3), 2c. (3) and 3c., overprint inverted on 1c., overprint from left to right 2c. (2) and inverted (2) plus overprint in red on 4c. and 7c.; also 18mm vertical overprint on 3c., 4c., 5c. and 7c.; a good group. Chan RLKS.2. (18)