COINS. CHINA - EMPIRE, GENERAL ISSUES. Hu Poo : Error Copper 20-Cash (2), ND (c.1917), with and without 4-pointed rosette at centre, both struck about 30% off-centre (KM Y5, 5.1); Honan Province : Error Copper 20-Cash, ND (c.1920), struck 20% off-centre (KM Y393). Fine to very fine. (3pcs)