CHINA, CHINESE Coins, Hong Kong, Queen Elizabeth II: Error 10-Cents 1979, struck on scalloped 20-Cents planchet; Error 20-Cents 1979, centred broad-strike out of collar; Error 50-Cents (2), 1978, 1979, both struck about 5% off-centre (KM 28.3, 36, 41 for types). First two brilliant uncirculated, the others extremely fine. (4pcs) Estimate: US$120-150