cover 1920 (Dec.) envelope from Harbin to Petrograd bearing 10c. on 10k. on 7k. tied by a light double ring d.s. and attractive Ataman Simeonoff (former ruler to China) label also Harbin surcharges 4c. on 4k. (perf.) surcharge inverted and 5c. on 5k. (imperf.) surcharge double, mint